Rasayana theory
How much weight this concept bears. Rasayana has more experimental work attached than most concepts in this cluster, and the shape of that work matters more than its volume. Taking the eleven modern references in this record by design class: three are human randomised trials of classical polyherbal rasayana formulations, of which one tests a disease indication (iron deficiency anaemia) rather than the rejuvenative claim; three are systematic reviews or meta-analyses of randomised trials of single herbs (Bacopa monnieri, Withania somnifera twice); three are narrative reviews with no primary data; and two are preclinical, one in Drosophila and one in rats. The record previously presented a count of eight references without this breakdown, which overstated the coverage, and it described the tested set as 'chiefly Amalaki rasayana and Chyawanaprash', which was true of the references then gathered and not true of the literature. The single-herb rasayana dravyas do carry randomised human trials with validated cognitive endpoints, and the Withania meta-analysis pools twenty of them. That corrects the record's former position that no human work exists on the cognitive claims. It does not make the classical claim supported, for four reasons that the record now states rather than implies. The single-herb trials test standardised extracts over eight to twelve weeks, not classical formulations under a classical regimen, and none has a longevity endpoint on any relevant timescale. Whether those herbs are even the drugs the classical medhya list names depends on plant identifications that the commentarial tradition itself disputes, Kaviratna recording Gangadhara's dissent on mandukaparni in a footnote. The structural parts of the theory remain untested in anything retrieved here: the shodhana precondition that both principal texts make a gate on administration, the achara rasayana passage, and whether the classical grouping picks out drugs sharing any property. And the yardstick is stated plainly in the texts now quoted, which promise a hundred years of retentive memory, verbatim recall on a single hearing, and in one place five hundred years of life. Against that, a 45-day improvement in a DNA repair assay and an SMD of 0.52 on memory tests are not small results in the wrong direction; they are results about a different question. The honest position is that several rasayana substances have genuine randomised human evidence on short-term cognitive, anxiety and sleep endpoints, that one classical formulation has a single good placebo-controlled trial on a cellular surrogate, and that rasayana theory as a theory remains untested.
Rasayana is the branch of Ayurveda concerned with measures taken to improve the quality of the bodily tissues rather than to remove a disease. Charaka defines it etymologically as the means of imparting superior rasa and the dhatus derived from it, and attaches a list of claimed outcomes. The exact content of that list is translation-dependent and this record now carries two renderings of it rather than one (see contested). It is delivered either as an intensive indoor regimen in a purpose-built chamber (kutipraveshika) or as a method pursued without such seclusion (vatatapika); Charaka names both at aphorism 16 of the rasayana lesson, and no statement ranking one above the other was found in Kaviratna's text of that lesson. Both classical authorities require prior purification: Sushruta compares rasayana given to an uncleansed body to dyeing a dirty cloth, and Charaka's first pada makes a cleansed bowel the physician's precondition for administering it. Vajikarana is not a separate subject appended to rasayana but is defined inside the same lesson, as the second of the two kinds of medicine that increase the ojas of a healthy person. The tradition also extends the category to conduct (achara rasayana), though on Kaviratna's text the passage describes a person whose conduct qualifies him as a user of rasayana and whose faults, uncast off, would stop rasayana working; the stronger reading, that conduct alone substitutes for the drug, is Kaviratna's footnote rather than his translation of the verses. Modern research has largely reinterpreted the category as antioxidant and immunomodulatory pharmacology of individual formulations, which is a substitution of subject matter rather than a test of the theory, though the single-herb rasayana dravyas carry a human randomised literature with cognitive and clinical endpoints that polyherbal-formulation research does not.
| Subject area | Principles of treatment |
|---|---|
| Domain, as recorded | treatment-principles |
| Contested questions | 7 |
| Stated as not known | 11 |
| Classical citations | 13, 11 quoting the text |
| Research papers assessed | 11 |
| Citations checked | 2026-10-08 |
What is contested, and by whom
These are the questions on which the sources genuinely disagree. Each position is given as its source states it. No position is presented as the settled answer, because none of them is.
Is prior shodhana actually necessary for rasayana to work?
This is contested.
- Sushruta's chapter 27 states it categorically, with the dyed-cloth analogy as justification. Charaka's first pada states it too, and now with a quote: the physician administers the formulation having ascertained that the bowels have been properly cleansed (Kaviratna aphorism 27). The record previously asserted the Charaka parallel without a citation; it is now sourced.
- The rasayana trials located here administered the formulation or extract without prior purification, and several reported positive results, which is at minimum in tension with the classical rule.
- No study located compared rasayana with and without preceding shodhana, so the claim is neither confirmed nor refuted by the work retrieved here; that literature simply proceeds as if the rule were not there.
Is rasayana a pharmacological category or a regimen?
This is contested.
- The classical framing makes the regimen constitutive, with the formulation as one element. The quoted Sushruta medhya chapter is explicit: prior cleansing, prescribed diet order, entry into a chamber and mantra recitation a thousand times are written into each individual preparation, not appended to it. Charaka specifies the chamber's siting, walls, windows and auspicious entry at aphorisms 17 to 23.
- Modern research treats rasayana as a set of formulations or, increasingly, single standardised extracts, and studies them as drugs, discarding the regimen entirely.
- Sushruta's vajikarana chapter lists the means of vajikarana as food, 'speech that gladdens the ears', touch, moonlit nights, song, company and 'a merry careless heart', with no drug among them, which is direct textual evidence that the paired category is not conceived pharmacologically either.
- Achara rasayana is often cited as the sharpest evidence for the non-pharmacological reading, on the ground that conduct with no drug at all produces the effect. That reading is now contested within this record: see the following question. No study of achara rasayana as an intervention was located.
Does achara rasayana claim that conduct replaces the drug, or that conduct conditions it?
This is contested.
- Conduct replaces the drug. This is Kaviratna's footnote to the passage: 'Such a person does not require the aid of any Rasayana of drugs. He attains, through his conduct, to all the effects of Rasayana.' It is the reading this record previously carried, in its summary, its component gloss and its contested section, attributed to Charaka.
- Conduct conditions the drug. This is what Kaviratna's translation of the verses themselves says. The person of such conduct 'should be known as a user of Rasayana' (52-56); he who has these attributes AND uses rasayana enjoys all its enumerated effects (57); he who has not cast off his graver faults never reaps them (58); the combinations succeed with those cleansed in mind and body (59). On this reading achara rasayana is continuous with the shodhana requirement rather than an alternative to pharmacology.
- The disagreement is a translator's footnote against the translator's own text, which is the fourth instance in this project of the defect where a translator's voice is absorbed as doctrine. It is recorded here rather than resolved. Settling it requires the Sanskrit of Charaka Chikitsasthana 1, fourth pada, which was not retrieved, and ideally Chakrapani's commentary; Kaviratna also notes at aphorism 58 that he believes Gangadhara has misunderstood the couplet, so the commentarial tradition is not unanimous either.
Which English rendering of Charaka's rasayana outcome list is correct?
This is contested.
- The record's former summary listed: long life, memory, intelligence, freedom from disease, retained youth, lustre, complexion, voice, strength of body and senses. That wording came from the verse-numbered edition at carakasamhitaonline.com, which is in copyright and was never quoted, so the list was a paraphrase of an unquotable source.
- Kaviratna's public-domain translation has: longevity of life, memory, apprehension, health, youth, brightness, complexion, excellence of voice, great strength of body and the senses, power of making speech true, bows (from others), and comeliness of features. Three items have no counterpart in the record's former list, and 'apprehension' and 'health' are materially weaker than 'intelligence' and 'freedom from disease'.
- Per the project's rule that disagreement between renderings is the data rather than a problem to resolve, both are recorded and neither is adopted as the record's own. Which is closer to the Sanskrit cannot be stated from what was retrieved here: no Sanskrit text of this passage was consulted.
What plants do the classical medhya rasayana names denote, and does the single-herb trial literature test them?
This is contested.
- Kaviratna's 1890s identifications, printed inline with the Charaka passage, are mandukaparni as Hydrocotyle asiatica and shankhapushpi as Pladera decussata. These are the translator's botanical attributions, not the text's.
- Kaviratna's own footnote records that Gangadhara identifies mandukaparni as danti, Baliospermum montanum, a quite different plant, so the identification is disputed inside the commentarial tradition.
- Current usage differs again: mandukaparni is generally taken as Centella asiatica and shankhapushpi most often as Convolvulus pluricaulis, while brahmi is widely identified with Bacopa monnieri and sometimes with Centella asiatica, the two names being used interchangeably in some regions and for different plants in others.
- This bears directly on the modern evidence. The Bacopa systematic review and the Withania meta-analyses are the strongest designs in this record, and whether they are evidence about a classical medhya rasayana drug at all depends on which identification is right. The record does not resolve this and does not treat those trials as tests of the classical drugs.
Do the classical rasayana formulations share any common active principle?
This is contested.
- The antioxidant hypothesis, dominant in the modern literature, treats them as a class unified by free-radical scavenging.
- The classical grouping is by claimed effect, not by composition, and includes items as different as amalaki preparations, bhallataka preparations, shilajatu, metals including gold and iron, and conduct. No source located demonstrates a shared mechanism across the classical list.
Where does the kamya / naimittika / ajasrika classification come from?
This is contested.
- It is very widely presented in contemporary Ayurvedic writing as a Charaka classification.
- It was not found in the retrieved verse-numbered edition of Charaka's Rasayana Adhyaya, nor in the public-domain Kaviratna text of that lesson now read in full for this record, which is consistent with it being a commentarial or later nibandha systematisation. Sources that attribute it directly to Charaka should be treated with caution. The search behind this was a reading of one lesson in one translation plus a keyword search of its OCR, which can support 'not found here' and cannot support a claim about the whole Charaka corpus.
What is not known
Stated rather than left out. Where a negative has actually been searched for rather than assumed, the entry says so.
- Whether any rasayana produces the specific classical outcomes over the timescales the texts name. This item previously read 'No trial with a clinical longevity or cognitive endpoint over a relevant timescale was located', and the first half of that was a search failure reported as an evidence gap: randomised human trials with validated cognitive endpoints exist for single rasayana dravyas and are now cited in this record. The gap that survives is narrower and still real. Nothing located has a longevity endpoint at all, and the cognitive trials run eight to twelve weeks against texts that promise a hundred years of retentive memory.
- Whether prior shodhana changes rasayana effect. Not tested in anything retrieved here, despite being a stated gate on administration in both principal texts.
- Whether kutipraveshika outperforms vatatapika. This item previously described the comparison as one 'the classical texts assert'. No statement ranking the two methods was found in Kaviratna's text of Charaka's rasayana lesson, where the two are named at aphorism 16 and elaborated only in the translator's footnotes, so the record no longer attributes the comparative claim to the text. Whether another classical text asserts it, and whether the comparison has ever been made experimentally, are both unknown here.
- Whether achara rasayana does anything. No study located. And, now, what achara rasayana claims in the first place: the drugless-substitute reading is Kaviratna's footnote and his translation of the verses reads the other way, so the question of what would even be under test is open.
- Whether the effects seen with Amalaki rasayana or Chyawanaprash persist after the formulation is stopped, or reflect only nutritional repletion in the study populations.
- What dose, duration and preparation method are required, and whether classical preparation procedure matters. The DNA-repair trial prepared the formulation strictly per traditional text but did not compare against a non-traditionally prepared control. The single-herb trials use standardised commercial extracts, which is a further step away from the classical preparation and makes the question harder rather than easier to answer from that literature.
- Whether rasayana formulations carry long-term harms. Several classical rasayanas involve bhallataka (Semecarpus anacardium), and Kaviratna's Charaka also gives shilajatu and preparations with gold and powdered iron; no long-term safety cohort was located. The Withania meta-analyses report on safety over trial durations of weeks, which does not address this.
- Whether the 'rasayana' grouping picks out any real biological kind, or is a heterogeneous list unified only by claimed benefit.
- What Charaka's own vajikarana chapter (Chikitsasthana 2) says. This record establishes from Chikitsasthana 1 that rasayana and vajikarana form one unit and that Charaka sequences them, and it quotes Sushruta's vajikarana chapter, but Charaka Chikitsasthana 2 was not retrieved or read and nothing is asserted about its contents. Scoped out rather than filled with a general statement.
- Whether standard Trikamji verse numbering agrees with Kaviratna's printed aphorism numbers at the locations cited here. Kaviratna prints his number after the aphorism and is documented in this project as running one behind Trikamji through at least Chikitsasthana 15 and Vimanasthana 5 and 8. At Chikitsasthana 1 his numbers for the definition passage (7-8) and the two methods (16) coincide with the numbers this record previously carried from a verse-numbered edition, and his number for the medhya drugs (34-35) does not coincide with the 1.3.30-31 commonly cited for that passage. No Sanskrit edition was consulted to adjudicate, so the record carries Kaviratna's own numbering and says so, rather than converting between systems.
- What the Sanskrit of Charaka Chikitsasthana 1 says at the passages quoted here, independent of Kaviratna's English. GRETIL's Caraka coverage is selected excerpts only, and no Sanskrit text of this lesson was retrieved. This is what the two translation disagreements recorded in contested would need in order to be settled, and it is the main piece of verification this record still lacks.
The terms this concept is built from
Each is a technical term in its own right. Where this site holds a lexicon entry for one, it is linked.
| Term | What it names |
|---|---|
| Rasayana (definition) | The means of imparting superior rasa and the succeeding dhatus; a quality-of-tissue intervention rather than a disease-directed one. Charaka places it as one of the two kinds of medicine aimed at the ojas of a healthy person, the other being vrishya. |
| Kutipraveshika | Indoor or 'hut-entering' method: administration after the patient enters a purpose-built closed chamber, whose siting, construction and auspicious timing Charaka specifies at aphorisms 17 to 23. Described as the more intensive of the two in the sense that it imposes a residential regimen the other does not. The record previously called it 'the more effective of the two'; that comparative was not found in Kaviratna's text of the lesson and has been withdrawn. |
| Vatatapika | The method pursued without entering a closed chamber. Kaviratna's footnote glosses the name as exposure to wind (vata) and sun (atapa) and cautions that it does not mean the patient actually sits in sun and wind, only that he is not confined; the fourth pada's footnote gives the alternative name Sauryamarutika. The gloss is the translator's, not the text's. |
| Shodhana as precondition | Prior purification, required by both Charaka and Sushruta for rasayana to take effect. Sushruta states it categorically with the dyed-cloth analogy; Charaka's first pada makes the physician's judgement that the bowels have been properly cleansed the condition of administering the formulation. |
| Medhya rasayana | The subset directed at intellect and memory rather than at the body generally. Charaka's third pada (Karaprachitiya) names mandukaparni, liquorice, guduchi and shankhapushpi, singling out shankhapushpi for strength of understanding; Sushruta's Chikitsasthana 28 treats the same subject at length under mandukaparni, brahmi and vacha. Which plants these names denote is contested. |
| Achara rasayana | Conduct-based rejuvenation: truthfulness, freedom from wrath, restraint, compassion and a long list of further attributes. On Kaviratna's text the person so described 'should be known as a user of Rasayana', and the following aphorisms make conduct the condition of the drug succeeding rather than a replacement for it. The claim that conduct alone produces rasayana effects with no drug at all appears in Kaviratna's footnote; the record previously carried the footnote's reading as the text's. |
| Vajikarana | The paired eighth branch, directed at reproductive capacity. Not merely adjacent to rasayana: Charaka defines both inside the rasayana lesson as the two kinds of medicine that increase the ojas of a healthy person, and announces at aphorism 14 that rasayana will be laid down first and vajikarana after. Sushruta gives it its own chapter at Chikitsasthana 26, immediately before the three rasayana chapters. |
| Named formulations | Brahmya rasayana, Chyavanaprasha, Amalaka rasayana, Haritaki rasayana and others; the operational content of the category in practice. Kaviratna's abstract of the part lists six combinations in the first section and nine in the second, several of the latter built on bhallataka (Semecarpus anacardium). |
The classical passages
Each citation gives its address so a reader can check it in a printed edition, our account of what it establishes, and the result of reading it against its source.
Charaka Samhita (Kaviratna translation, 1896-1913)Chikitsa Sthana 1 (Rasayana Adhyaya), first pada (Abhayamalakiya):Kaviratna's printed aphorism number 7-8 · checked against the source
From the administration of 'Rasayana' one obtains longevity of life, memory, apprehension, health, youth, brightness, complexion, excellence of voice, great strength of body and the senses, power of making speech true, bows (from others), and comeliness of features. These drugs (or preparations) are called 'Rasayana' because of their capacity to impart superior 'Rasa' and other 'dhatus' (or ingredients of the body). 7-8
The list of claimed rasayana outcomes and the etymological definition, now quoted from a public-domain translation instead of recorded on verse numbers taken from an in-copyright edition. Kaviratna prints his aphorism number 7-8 AFTER the passage, which is the documented house style of this translation. That number coincides with the location 1.1.7-8 the record previously carried from carakasamhitaonline.com, so the one-behind divergence documented for Kaviratna elsewhere does not appear here; whether standard Trikamji numbering agrees was not independently checked against a Sanskrit edition and is recorded in notKnown. Note that Kaviratna's rendering of the outcome list is not the list the record's summary previously asserted: he has 'apprehension' where the record had 'intelligence', 'health' where the record had 'freedom from disease', and he carries three further items ('power of making speech true', 'bows (from others)', 'comeliness of features') that the record omitted. The disagreement is recorded in contested rather than resolved.
Charaka Samhita (Kaviratna translation, 1896-1913)Chikitsa Sthana 1 (Rasayana Adhyaya), first pada (Abhayamalakiya):Kaviratna's printed aphorism numbers 5, 9-12, 13, 14 · checked against the source
That which increases the ojos of a healthy person is of two kind s viz., 'Vrishya' (aphrodisiacs), and 'Rasayana (tonics). 5 ... That, again, which leads to the birth of children and children's children, that which causes immediate pleasure, that by which one is enabled to approach women, unimpededly and with the strength of a stallion, that by which one becomes the favourite of women, that by which one grows (in strength and energy), that by which the vital seed of a person who is even decrepit is seen to become inexhaustible and fruitful ... is called 'Vajikarana' (or aphrodisiac). 9-12 ... Thus have been mentioned the two kinds of medicines (viz., Rasayana' and Vajikarana) for increasing the ojos of a healthy man. ... 13 ... We shall first lay down the ordinances in respect of 'Rasayana.' Then we shall speak of 'Vajikarana.' 14
That rasayana and vajikarana are one unit of the classical architecture rather than two subjects that happen to sit next to each other. Charaka's rasayana lesson itself divides medicine aimed at the ojas of the healthy into vrishya and rasayana, defines vajikarana within that division, and sequences the two. Added in answer to the critic's finding that the record listed vajikarana as a component with no reference. Ellipses mark omitted intervening material; the omitted stretch of 9-12 continues the list of vajikarana's claimed effects (progeny, fame, prosperity) without changing the sense. The OCR prints the aphorism number for 9-12 as '9-iz'; it is read as 9-12 and that reading is an inference from the surrounding sequence, not a clean scan.
Charaka Samhita (Kaviratna translation, 1896-1913)Chikitsa Sthana 1 (Rasayana Adhyaya), first pada (Abhayamalakiya):Kaviratna's printed aphorism number 16 · checked against the source
The Rishis understood that there are two methods for the administration of Rasayanas.' These are 'Kutipravegika' and 'VatStapica.' 16
The two modes of administration, now quoted from the public-domain translation rather than recorded on an in-copyright edition's verse number. Kaviratna's printed number is 16, matching the location the record previously carried. The scan's OCR garbles his transliteration: 'Kutipravegika' is Kutipraveshika (Kaviratna writes the palatal sibilant with a cedilla that the recogniser reads as g) and 'VatStapica' is Vatatapika. The passage names the two methods and does nothing more; it does not rank them. Kaviratna's footnote at this point, which explains kuti as a chamber and pravesha as entrance, is the translator's gloss and not part of the text.
Charaka Samhita (Kaviratna translation, 1896-1913)Chikitsa Sthana 1 (Rasayana Adhyaya), first pada (Abhayamalakiya):Kaviratna's printed aphorism numbers 24 and 27 · checked against the source
Then (in that chamber), cleansed by correctives, becoming cheerful, and having gained strength, one should again have 'Rasayana' administered unto oneself. The correctives one will use I shall now lay down. 24 ... When the physicians conversant with considerations of age, nature of constitutions, and power of assimilation, having ascertained that the bowels of the person have been properly cleansed, should administer to him 'Rasayana' consisting of (proper) combinations. That should be administered to the individual which is suitable to him .27
Charaka's parallel shodhana requirement, which the record previously asserted without a quote. Purification is not a general recommendation here but the physician's gate: the formulation is given once he has ascertained that the bowels are cleansed. This is the Charaka-side support for the contested question on whether prior shodhana is necessary, and it means that question rests on both principal texts rather than on Sushruta alone.
Charaka Samhita (Kaviratna translation, 1896-1913)Chikitsa Sthana 1 (Rasayana Adhyaya), third pada (Karaprachitiya):Kaviratna's printed aphorism number 34-35 · checked against the source
The expressed juice of 'Mandukaparni' (Hydrocotyle Asiatica), liquorice reduced to pulv, or the juice of 'Guduchi' (Tinospora cordifolia), should be used with milk. The paste also of the roots and the blossoms of 'Qankhapushpi' (Pladera decussata) should be used with the liquid. These 'Rasayanas' promote longevity, destroy disease, increase strength, and improve digestion, complexion, and voice. They also invigorate the understanding. Of these, again, that made of 'Qankhapushpi' (Pladera decussata) especially conduces to strength of understanding. 34-35
The four medhya rasayana drugs of Charaka's third pada, which the critic flagged as a component with no reference. Added in answer to that finding. Three points of translator's voice must travel with this quote. First, the section headings 'MEDHAKARA RASAYANA' and 'RASAYANA THAT INVIGORATES THE UNDERSTANDING' are Kaviratna's editorial additions. Second, the Latin binomials are his 1890s botanical identifications, not the text's, and they are not the identifications in current use: mandukaparni is now generally Centella asiatica and shankhapushpi most often Convolvulus pluricaulis. Third, Kaviratna footnotes that Gangadhara identifies mandukaparni as danti (Baliospermum montanum) instead, so the plant behind the first name is disputed inside the commentarial tradition itself. Kaviratna prints 34-35; the location usually cited for this passage in modern writing is 1.3.30-31, which was not verified against a Sanskrit edition, so only Kaviratna's own number is recorded.
Charaka Samhita (Kaviratna translation, 1896-1913)Chikitsa Sthana 1 (Rasayana Adhyaya), fourth pada (Ayurveda Samutthaniya):Kaviratna's printed aphorism numbers 52-56, 57, 58, 59 · checked against the source
One that is truthful, and free from wrath, that abstains from wine and sexual indulgence, that has no animosity, that undergoes only such labour as involves no fatigue, that is tranquil and of amiable speech, that is accustomed to the silent recitation of sacred texts, and is pure (in body and mind), that is endued with gravity and firmness, that is always charitable and engaged in penances ... that is devoted to the scriptures, should be known as a user of 'Rasayana.' 52-56 (Further) he who, endued with these high attributes, uses Rasayana', enjoys all the effects enumerated of 'Rasayana.' 57 That person who, without casting off (at least) the graver faults of both body and mind, (uses 'Rasayana'), never reaps the effects of Rasayana. 58 (Rasayanic) combinations, which have for their objects the lengthening of (the period of) life and the prevention of decrepitude and disease, succeed with those who are cleansed in respect of mind and body and who have their souls under control. 59
Achara rasayana, quoted from Kaviratna. On his printed aphorisms 52-56 the passage characterises, through a long list of attributes, a person who 'should be known as a user of 'Ras3yana'', and the three aphorisms that follow make conduct bear on whether the drug works: he who is endued with these attributes and uses rasayana enjoys all its enumerated effects (57), he who has not cast off the graver faults of body and mind never reaps them (58), and the combinations succeed with those who are cleansed in mind and body and have their souls under control (59). What this passage establishes is therefore conduct as potentiator or precondition at 57-59. It does not establish anything against the drugless-substitute reading, and must not be cited that way, because Kaviratna's own footnote marked § at the close of 52-56 states that reading in his own words: 'This section is headed 'Achara-Rasayanam', that is, the 'Rasayana of conduct'. The- Eind of person* here described should be known as- one whose very conduct operates as a •Rasayana.' Such a person does not require the aid of any 'Rasayana' of drugs. He attains, through his conduct, to all the effects of 'Rasayana.', T.' (OCR as printed.) That is the translator's gloss rather than the mula, and it attaches to 52-56 only; the record should carry it alongside the quote and leave the substitute question open.
Charaka Samhita (Kaviratna translation, 1896-1913), TRANSLATOR'S FOOTNOTE, held as an exhibit and not as doctrineChikitsa Sthana 1 (Rasayana Adhyaya), fourth pada (Ayurveda Samutthaniya):Kaviratna's footnote to aphorisms 52-56 · checked against the source
This section is headed 'Achara-Rasayanam', that is, the 'Rasayana of conduct'. The kind of person here described should be known as one whose very conduct operates as a 'Rasayana.' Such a person does not require the aid of any 'Rasayana' of drugs. He attains, through his conduct, to all the effects of 'Rasayana.' - T.
The source of the record's former achara rasayana claim, and a fourth instance of the defect this project has documented three times: the translator's voice absorbed as doctrine. 'Such a person does not require the aid of any Rasayana of drugs' is Kaviratna's gloss, signed with his own '- T.', and it is in tension with his translation of aphorisms 57 to 59 immediately above it. The record had the footnote's reading in its component gloss, its summary and its contested section, attributed to the classical text. It is retained here as an exhibit of how the claim entered the record, which is what the lexicon exists to make visible, and not as support for the claim.
Sushruta Samhita (Bhishagratna translation, 1907-1916), Vol. IIChikitsa Sthana 27 (Sarvopaghata-shamaniya Rasayana):Bhishagratna's own printed section numbers 1 and 2; he prints no Sanskrit verse numbers anywhere · checked against the source
Now we shall discourse on the recipes and modes of using elixirs and rejuvinators of the human organism which will make it invulnerable to the inroads of any disease or of decay (Sarvopaghata-shamaniya-Rasayanam). 1. Metrical Texts :- A wise physician should (invariably) prescribe some sort of tonic (Rasayana) for his patients in their youth and middle age after having their systems (properly) cleansed by the applications of a Sneha and purifying remedies (emetics and purgatives). A person whose system has not been (previously) cleansed (Sodhana) with the proper purifying remedies (emetics and purgatives) should not, in any case, have recourse to such tonics inasmuch as they would fail to produce the wished-for result, just as the application of a dye to a piece of dirty cloth will prove non-effective. 2.
Three things at once: the scope claim (invulnerability to disease and decay), the timing rule (youth and middle age, not old age), and the prerequisite of prior shodhana with the dyed-cloth analogy as its whole justification. The citation previously read '27.1-27.2' in a form that could be mistaken for Sanskrit verse numbers. Bhishagratna prints no Sanskrit verse numbers, only his own section numbers, so the locator is now stated as his section numbering explicitly. The content of the quote was checked against the source and is unchanged.
Sushruta Samhita (Bhishagratna translation, 1907-1916), Vol. IIChikitsa Sthana 27 (Sarvopaghata-shamaniya Rasayana):Bhishagratna's own printed section numbers 3-4; he prints no Sanskrit verse numbers anywhere · checked against the source
Old age and senile decay would be arrested (lit.- perpetual or life-long youth would be secured) by drinking milk, cold water, honey and clarified butter, either severally or jointly ... in early life (just on or just before the completion of the process of organic development).
The character of the claims actually being made: arrest of senescence from a combination of four ordinary dietary substances taken early in life. Useful as a check on modern restatements that soften rasayana into 'general tonic' language. Locator restated as Bhishagratna's section numbering for the same reason as the preceding entry.
Sushruta Samhita (Bhishagratna translation, 1907-1916), Vol. IIChikitsa Sthana 26 (Kshina-Baliya Vajikarana), printed as 'The medical treatment for increasing virility':Bhishagratna's own printed section numbers 1, 2-A, 2-B and 2, in that printed order · checked against the source
Now we shall discourse on the medical treatment for increasing the strength and virile power of weak persons (Kshina-Valiyam Vaji-Karana). i. ... Definition of Vaji-Karana :— if duly taken, the Vaji-karana* remedies make a man sexually as strong as a horse (Vaji), and enable him to cheerfully satisfy the heat and amorous ardours of young maidens, a fact which has determined the nomenclature of this class of (^medicinal) remedies. 2-B. Means of Vaji-Karana :--Various kinds of (nutritious and palatable) food and (sweet, luscious and refreshing) liquid cordials, speech that gladdens the ears, and touch which seems delicious to the skin, clear nights mellowed by the beams of the full moon and damsels young, beautiful and gay, dulcet songs that charm the soul and captivate the mind, use of betel-leaves, wine and wreaths of (sweet-scented) flowers, and a meny careless heart, these are the best aphrodisiacs in life. 2.
Vajikarana in Sushruta, as the chapter immediately preceding the three rasayana chapters, which is the second half of the answer to the critic's finding that vajikarana sat in the components with no reference. The 'Means of Vaji-Karana' passage is also direct evidence for the contested question of whether these categories are pharmacological or regimen-based: the means listed are food, speech, touch, moonlight, music, company and a cheerful heart, with no drug among them. Two cautions. The headings 'Definition of Vaji-Karana' and 'Means of Vaji-Karana' are Bhishagratna's editorial insertions, not the text's. And the numbering as printed runs 1, then 2-A, then 2-B, then 2, which is his own sectioning and not Sanskrit verse numbers; the apparent disorder is in the source.
Sushruta Samhita (Bhishagratna translation, 1907-1916), Vol. IIChikitsa Sthana 28 (Medhayushkamiya Rasayana), printed as 'Elixirs (rasayana) to improve memory and life span':Bhishagratna's own printed section numbers 1, 4 and 5; he prints no Sanskrit verse numbers anywhere · checked against the source
Now we shall discourse on the elixirs and remedial agents which tend to improve the memory and invigorate the mental faculties as well as to increase the duration of human life (Medhayushkamiyam Rasayana). 1. ... Manduka-parni Rasayana:- The Doshas of the system of a person should be first thoroughly cleansed (with the help of proper emetics and purgatives, etc.), and he should be advised to undergo the prescribed diet ... An adequate dose of the expressed juice of the Manduka-parni should then be stirred with milk, and should be taken after consecrating it by reciting the proper Mantras a thousand times ... This would ensure a long life of a hundred years in the full vigour of retentive memory and intellectual faculties, and would impart a god-like effulgence to the complexion. 4. Brahmi Rasayana:- ... A continuous use of the medicine for a week improves the memory, leads to the expansion of the intellectual faculties and imparts a celestical glow to the complexion. In the second week of its course it revives old and forgotten memories in the user and adds to his proficiency in the writing out of any book to be written. In the third week it enables a man to reproduce from memory as many as one hundred words if twice heard or read (at a single sitting). In the same manner a (further) use of the drug for twenty-one days removes all inauspicious features whether of the body or of the mind, the goddess of learning appears in an embodied form to the (mind of the) user, and all kinds of knowledge come rushing into his memory. A single hearing is enough to make him reproduce (verbatim from memory a discourse however lengthy), and he is enabled to live for five hundred years. 5.
The medhya rasayana material in Sushruta, quoted rather than merely located, which upgrades what this record previously carried as an unquoted chapter-contents note. Two things the quoted text supports. The prior-cleansing requirement recurs inside each individual preparation, not only in the general rule at chapter 27: 'The Doshas of the system of a person should be first thoroughly cleansed' in section 4, 'Having had the Doshas of the system duly cleansed' in section 5. And the regimen is constitutive to the extent the quoted words show it: the prescribed diet and the consecration of the dose by reciting the proper Mantras a thousand times are part of the prescription, not optional accompaniments. Seclusion is not claimed from this quote; the sentences in the chapter that would carry it fall inside the ellipses and are not quoted here. The scale of the claims is worth recording exactly, because 'a long life of a hundred years', verbatim recall of a discourse on a single hearing, the appearance of the goddess of learning in an embodied form and a life of five hundred years are what the text says; this is the yardstick against which a modern surrogate-marker result should be read, and it is the clearest reason this record treats the classical claim as untested rather than partly supported.
Sushruta Samhita (Bhishagratna translation, 1907-1916), Vol. IIChikitsa Sthana 29-30
Sushruta continues rasayana past chapter 28 into Svabhavavyadhi-pratishedhaniya (printed as 'Elixirs for the prevention of death and decay') and Nivritta-samtapiya (printed as 'Elixirs to remove mental and physical distress'). The chapter headings were retrieved from the volume's chapter list and confirmed; the individual preparations named in the contents index include Svetavalguja, Krishnavalguja, Mandukaparni, Brahmi and Vacha rasayanas, of which the last three fall in chapter 28 and are now quoted in the entry above. Recorded as located: no quote is attributed from chapters 29 or 30 and no section numbers within them were confirmed. The entry previously spanned 'chapters 28-30' and has been narrowed to 29-30 because 28 is now carried as a quoted citation of its own.
Sharngadhara Samhita and Bhavaprakasha
Later nibandha texts carry rasayana forward and are the usual source cited for the kamya / naimittika / ajasrika three-way classification of rasayana (rasayana for desired qualities, for a specific disease, and for daily use). Note that this classification was not found in the Charaka text itself, either on the retrieved verse-numbered edition or in the public-domain Kaviratna text of Chikitsasthana 1 now read for this record, which is consistent with it being a commentarial or later systematisation. No public-domain English translation of either text has been located, so paraphrase only.
What the research actually shows
Every paper located for this concept, with what it measured and what it does and does not establish. The assessment is ours.
Effect of Amalaki rasayana on DNA damage and repair in randomized aged human individuals. · J Ethnopharmacol · 2016 · PMID 27364038 · human randomised placebo-controlled trial
Randomised placebo-controlled trial of Amalaki rasayana prepared per classical text, given to healthy aged volunteers for 45 days. UVC-induced DNA strand break repair was stably maintained or enhanced in the rasayana group with no adverse effects; nucleotide excision repair and base excision repair were unchanged.
How much it shows. The best-designed study of a classical polyherbal rasayana formulation located for this record: randomised, placebo-controlled, mechanistically specific, with a negative result honestly reported on two of three repair pathways. Limitations are real: 45 days, a surrogate cellular endpoint with no clinical outcome, and the authors themselves call for further work. It tests one formulation, not rasayana theory.
Ayurvedic Amalaki Rasayana promotes improved stress tolerance and thus has anti-aging effects in Drosophila melanogaster. · J Biosci · 2016 · PMID 27966490 · preclinical, invertebrate model
Amalaki rasayana improved stress tolerance and extended measures of healthy lifespan in Drosophila melanogaster.
How much it shows. Preclinical model organism study. Methodologically sound for what it is, and useful as mechanistic support, but a fly model cannot establish the human claims made in Charaka's rasayana lesson and is not evidence about rasayana as a category.
Evaluation of Cyavanaprāśa on Health and Immunity related Parameters in Healthy Children: A Two Arm, Randomized, Open Labeled, Prospective, Multicenter, Clinical Study. · Anc Sci Life · 2017 · PMID 28867858 · human randomised open-label trial
Two-arm randomised multicentre study in 702 school children (627 completers) comparing six months of Chyawanaprash plus milk against milk alone, reporting more than twofold reduction in immunity-related illness episodes and better parent-reported energy, fitness and quality of life.
How much it shows. Mixed. Large and randomised, which is unusual in this literature, and prospectively registered (CTRI/2015/02/005574). But open-label with no placebo, outcomes recorded in parent-kept diaries so wholly unblinded and subject to expectancy, and three of the authors are employed by the manufacturer, which is disclosed. The effect size should be treated as an upper bound, not an estimate.
Clinical efficacy of Amalaki Rasayana in the management of Pandu (Iron deficiency anemia). · Ayu · 2015 · PMID 27313416 · human randomised trial, disease indication not rejuvenative claim
Randomised comparison of Amalaki Rasayana against ferrous fumarate with folic acid in iron deficiency anaemia over 45 days.
How much it shows. Small single-centre trial in a low-visibility journal, unblinded, and testing a disease-specific indication rather than the rejuvenative claim. Included to show the range of what 'rasayana research' actually contains.
Rasayana therapy in classical literature of Ayurveda: a review. · Bull Indian Inst Hist Med Hyderabad · 1998 · PMID 12596736 · narrative/textual review
Survey of rasayana therapy as presented in the classical literature.
How much it shows. Textual review in a history-of-medicine bulletin. Not empirical, and not an evidence assessment. Useful for doctrine, not for efficacy.
Plant-based Rasayana drugs from Ayurveda. · Chin J Integr Med · 2011 · PMID 21390573 · narrative review
Overview of plant-based rasayana drugs, reporting that antioxidant and immunomodulation are the most studied activities of rasayana drugs.
How much it shows. Narrative review. Its own summary is the honest datapoint: the literature has converged on two assayable activities and largely stopped there, which is a substitution of tractable pharmacology for the classical claim rather than a test of it. Note that this generalisation is about rasayana drugs as a class and sits in tension with the single-herb cognitive trial literature recorded below, which uses behavioural rather than biochemical endpoints.
Neuronutrient impact of Ayurvedic Rasayana therapy in brain aging. · Biogerontology · 2008 · PMID 18931935 · narrative review
Discussion of rasayana therapy as neuronutrition in brain ageing.
How much it shows. Narrative review in Biogerontology. Restates the medhya rasayana doctrine in modern neurobiological vocabulary and proposes mechanisms; no primary data and no clinical endpoint.
Geroprotection through modulation of heart rate variability, oxidative enzymes, tissue integrity, and gene expression by an Ayurvedic herbal formulation, Amalaki Rasayana. · J Ayurveda Integr Med · 2026 · PMID 42172813 · preclinical, rodent
Amalaki Rasayana supplementation in ageing male Fischer rats (36 animals, assessed at 18, 24 and 30 months) reported maintained heart rate variability, preserved antioxidant enzymes, reduced tissue degeneration and gene expression changes.
How much it shows. Preclinical rodent study with a longitudinal design, which is a genuine strength for an ageing claim. Still a single formulation in a single strain, with surrogate endpoints, and no human bridge.
The cognitive-enhancing effects of Bacopa monnieri: a systematic review of randomized, controlled human clinical trials. · J Altern Complement Med · 2012 · PMID 22747190 · systematic review of human randomised controlled trials
Systematic review of randomised controlled human trials of Bacopa monnieri for cognitive performance in adults without dementia or significant cognitive impairment. Six trials met inclusion, all twelve weeks, three different extracts at 300-450 mg/day. Across studies Bacopa improved performance on 9 of 17 tests in the domain of memory free recall, with, in the authors' words, 'little evidence of enhancement in any other cognitive domains'.
How much it shows. Added in answer to the critic's missing-modern and overclaimed findings, both of which turned on this reference. It is a properly conducted systematic review of randomised human trials with validated cognitive endpoints, which is a stronger design class than anything else in this record. Three limits on what it can do here. It evaluates a single herb, not a classical rasayana formulation or regimen. Its own conclusion is narrow: memory free recall improved, other domains did not, and the authors describe the field as 'in its infancy'. And whether Bacopa monnieri is a drug of the classical medhya rasayana list at all depends on an unsettled plant identification, since brahmi is identified with Bacopa monnieri in much modern writing while Kaviratna's Charaka gives mandukaparni as Hydrocotyle asiatica and Gangadhara as danti; see contested.
Effects of Withania somnifera (L.) Dunal (Ashwagandha) on cognitive and physical function in adults: a systematic review and meta-analysis. · Front Pharmacol · 2026 · PMID 42199854 · systematic review and meta-analysis of human randomised controlled trials
Systematic review and meta-analysis (PRISMA, PROSPERO CRD420261292996) of randomised trials of Withania somnifera in adults, 20 studies and 1,249 participants. Reports improvement in memory (SMD 0.52, 95% CI 0.27-0.78), attention and processing speed (SMD 0.29, 95% CI 0.07-0.51), executive function (SMD -0.42, 95% CI -0.70 to -0.13), testosterone (SMD 0.33, 95% CI 0.13-0.54) and muscle strength (SMD 0.58, 95% CI 0.12-1.04), with no significant effect on body weight or body fat percentage. Risk of bias assessed with RoB 2 and certainty with GRADE.
How much it shows. Added in answer to the critic's missing-modern finding, which named the Withania RCT and meta-analytic literature specifically. Methodologically the most thorough synthesis in this record: registered protocol, RoB 2, GRADE, and botanical reporting assessed with ConPhyMP, which matters in a literature where extract identity is usually unstated. Caveats that keep it from settling anything about rasayana theory. Muscle strength was heterogeneous (I2 56.9%) and significant only in physically active subgroups. Global cognition rested on a single study. Trial durations are the eight-to-twelve-week range typical of supplement research, not a timescale on which a longevity claim could be examined. And as with Bacopa, this is one herb standardised as an extract, not a classical formulation administered under a classical regimen.
Safety and efficacy of Withania somnifera for anxiety and insomnia: Systematic review and meta-analysis. · Hum Psychopharmacol · 2024 · PMID 39083548 · systematic review and meta-analysis of human randomised controlled trials
Systematic review and meta-analysis of randomised placebo-controlled trials of Withania somnifera for anxiety and insomnia. Five RCTs, 254 participants pooled; Hamilton Anxiety Scale reduced (MD -5.96, 95% CI -10.34 to -1.59, p = 0.008) with I2 of 98%, and sleep onset latency, total sleep time, PSQI and sleep efficiency improved while wake after sleep onset and total time in bed did not.
How much it shows. Added alongside the Frontiers meta-analysis so that the Withania literature is not represented only by its most favourable synthesis. The pooled anxiety estimate carries I2 of 98%, which is close to total heterogeneity and makes the point estimate hard to interpret whatever its confidence interval; the authors' own conclusion is that larger trials are needed to confirm the effects. Total pooled n is 254. Anxiety and insomnia are also disease-adjacent indications rather than the rejuvenative claim, so this sits in the record for the same reason as the anaemia trial: to show what the evidence base actually contains.
Open questions on this record
Recorded rather than resolved: what this entry cannot currently settle.
- Charaka Chikitsasthana 2 (vajikarana) is available in the same public-domain Kaviratna translation and has not yet been read for this record.
- Kaviratna's Lesson I contains further quotable material not drawn on here, including the chamber specification at aphorisms 17 to 23, the bhallataka preparations of the second pada, and shilajatu and metal rasayanas in the third, which bear on the unanswered long-term safety item in notKnown.
- Kaviratna's abstract of this part carries editorial claims in his own voice that should not be mistaken for the text, among them that no system of medicine except the Hindu gives such importance to the treatment of the healthy, and a footnote elsewhere glossing rasayanas as 'drugs prepared with the three myrobalans'. Flagged here because this record has already had one footnote absorbed as doctrine.
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