Gandhak Rasayan
Gandhak Rasayan is a compound formulation of several ingredients, from the Rasa Shastra (Ayurvedic mineral/metal preparation - not a plant family) family. Not listed in WHO monographs; classified as a Rasa Shastra preparation in Ayurvedic Pharmacopoeia of India; subject to AYUSH regulatory guidelines for herbo-mineral formulations.
| Substance type | Compound formulation of several ingredients, not a single plant |
|---|---|
| Family | Rasa Shastra (Ayurvedic mineral/metal preparation - not a plant family) |
| Also known as | Gandhak Rasayan, GandhakRasayan, Purified Sulfur (Shuddha Gandhak) - mineral preparation |
| Pharmacopoeia status | Not listed in WHO monographs; classified as a Rasa Shastra preparation in Ayurvedic Pharmacopoeia of India; subject to AYUSH regulatory guidelines for herbo-mineral formulations |
The evidence at a glance
1paper on this site for this drug, every one with a DOI.
- 1Laboratory and animal studies
A count is not a conclusion and a tier is a study design, not a verdict. Everything listed here is laboratory or animal work, which does not show an effect in people.true See the research index for how papers are tiered.
Names and identification
| Language | Name |
|---|---|
| English | Gandhak Rasayan |
| Latin/Botanical | Purified Sulfur (Shuddha Gandhak) - mineral preparation |
Key Phytochemical Constituents
- Purified elemental sulfur (primary active)
- Trace minerals from herbal processing media
- Herbal bioactives from Triphala Kashaya (processing medium)
- Cow’s milk proteins and lipids (processing medium residuals)
- Sulfur compounds formed during Shodhana purification
- Polyphenols from herbal decoction processing
How does it work?
- Antimicrobial mechanism through sulfur’s inherent keratolytic and antimicrobial action disrupting bacterial cell wall synthesis and fungal membrane integrity
- Immunomodulatory mechanism through enhancement of immune cell function and modulation of inflammatory pathways, supported by polyphenol contribution from Triphala processing
- Detoxification mechanism through sulfur’s role in glutathione synthesis and hepatic phase II conjugation reactions, enhancing toxin elimination pathways
Which traditional uses are supported by research?
These summaries come from the source notes, which do not name the studies behind them.
- Kushtha (skin diseases): traditionally used for skin diseases. In vitro studies have reported antimicrobial activity against Staphylococcus aureus and Candida species.
- Rasayana (rejuvenation): traditionally used as a rejuvenative. Studies have reported immunomodulatory activity.
- Traditionally used for detoxification. A pilot clinical study in eczema reported improvement in skin hydration.
What do recent studies show?
- Mundugaru R, Ballal SR, Bhat S and others 2021. Chronic toxicity studies of gandhaka rasayana - A herbo-mineral preparation used in Ayurvedic practice. Journal of Ayurveda and integrative medicine. PMID 34736857 · doi:10.1016/j.jaim.2021.05.011
180-day chronic toxicity study in animal models showed the formulation is safe at traditional therapeutic doses; no significant toxic effects on hematological, biochemical, or histopathological parameters.
Only studies that could be traced to a published paper are listed here. An absence here means we could not identify the source, not that no work exists.
Recent safety updates
- 180-day chronic toxicity study supports safety at traditional doses; however, unpurified (Ashuddha) Gandhak may contain toxic levels of arsenic, lead, and mercury - only Shodhana-purified sulfur (minimum 3 purification cycles) should be used medicinally
- Potential side effects include GI discomfort (nausea, diarrhea) and allergic reactions in sulfur-sensitive individuals; contraindicated in severe liver/kidney disease; should be sourced only from GMP-certified Ayurvedic manufacturers
What is it made of?
Dosage forms and preparation
Dosage Forms: Tablet (primary), Vati (traditional pill), Churna (powder - less common)
Standard Dosage: 250-500mg tablet twice daily with milk or warm water. Classical dose: 1-2 Vati (250mg each) twice daily. Use under practitioner supervision.
Optimal Timing: After meals with milk or warm water; traditionally taken in the morning and evening
Storage: Airtight containers at room temperature. Protect from moisture. Sulfur is stable under normal storage conditions. Keep away from oxidizing agents and heat sources.
Marker Compounds: Elemental sulfur (S8, primary active), Sulfur purity assay, Heavy metals (As, Pb, Hg, Cd - safety limits), Herbal marker from Bhavana medium (e.g., gallic acid from Triphala, berberine from Daruharidra if used)
Synergistic Combinations
- With Guduchi for skin disease and immune support
- With Haridra for chronic skin conditions
- With Nimba for antibacterial and dermatological synergy
- With Triphala for internal cleansing and antioxidant support
- With Amalaki juice as Bhavana medium for enhanced Rasayana effect
Published research
Literature indexed in PubMed that concerns this subject, grouped by study type. A paper appearing here is a record of what has been published, not evidence that the subject works, and laboratory or animal results do not transfer to people. Study titles link to PubMed so you can read the source rather than take our word.
Laboratory and animal studies1
- 2021. Chronic toxicity studies of gandhaka rasayana - A herbo-mineral preparation used in Ayurvedic practiceJournal of Ayurveda and integrative medicine. PMID 34736857 · doi:10.1016/j.jaim.2021.05.011
Reviewed by Dr. Awadesh Pratap Singh, BAMS, on 11 October 2026. What that review covered.
Consult a qualified vaidya before acting on anything here. Ayurvedic practice is prescribed to a person, not to a condition: the same dravya is given, withheld or substituted depending on your constitution, your agni, the season and what else you are already taking. A page cannot know any of that. Self-prescribing from a reference is how the wrong preparation, the wrong dose or the wrong anupana gets used.
Educational reference only. Nothing on this page is medical advice, a diagnosis, or a recommendation to take anything. Traditional uses and research findings are reported as published, not as claims about what any product does. If you take prescribed medication, raise any interaction with the prescriber rather than acting on a page. See our editorial standards.