Twak Cinnamon

Names and identification

Language	Name
English	Twak Cinnamon
Latin/Botanical	Cinnamomum verum

Key Phytochemical Constituents

• Cinnamaldehyde (65% of bark oil)
• Eugenol (75-80% of leaf oil)
• Cinnamyl acetate
• Linalool
• Cinnamic acid (phenylpropanoid)
• Coumarin (trace amounts: 0.012-0.143 mg/g in Ceylon variety)
• Camphor
• Copane

How does it work?

• Cinnamaldehyde enhances insulin receptor phosphorylation and increases GLUT4 translocation, improving cellular glucose uptake
• Activation of AMPK (AMP-activated protein kinase) pathway leads to enhanced fatty acid oxidation and reduced lipogenesis
• Phenylpropanoids (cinnamic acid, eugenol) inhibit alpha-glucosidase and alpha-amylase, slowing carbohydrate digestion and absorption
• Anti-inflammatory mechanism via suppression of NF-kB activation and reduction of pro-inflammatory cytokines (TNF-alpha, IL-6, CRP)
• Antioxidant activity through direct free radical scavenging and upregulation of endogenous antioxidant enzymes (SOD, catalase, GPx)

Which traditional uses are supported by research?

These summaries come from the source notes, which do not name the studies behind them.

• Blood sugar regulation in diabetes: traditionally used for blood sugar regulation. Clinical trials and meta-analyses have reported improvements in blood glucose and HbA1c.
• Carminative and digestive aid: traditionally used for dyspepsia and flatulence.
• Anti-inflammatory use: traditionally used for joint and muscle pain. Clinical studies have reported reduced inflammatory markers (CRP, TNF-alpha, IL-6).
• Antimicrobial use: traditionally used for infections. In vitro and in vivo studies have reported broad-spectrum activity of cinnamaldehyde.
• Lipid lowering: traditionally used for cardiovascular health. Clinical trials have reported reduced triglycerides, LDL-C, and total cholesterol.

What do recent studies show?

• Gou H, Zhong L, Wei Q and others 2025. The effects of cinnamon on patients with metabolic diseases: an umbrella review of meta-analyses of randomized controlled trials. Frontiers in nutrition. PMID 41256917 · doi:10.3389/fnut.2025.1683477
  Comprehensive umbrella review across PubMed, Web of Science, Embase, Scopus, and Cochrane Library (up to March 2025) confirmed cinnamon supplementation improves metabolic parameters in diabetes, metabolic syndrome, PCOS, NAFLD, and hypertension.
• Gu DT, Tung TH, Jiesisibieke ZL and others 2021. Safety of Cinnamon: An Umbrella Review of Meta-Analyses and Systematic Reviews of Randomized Clinical Trials. Frontiers in pharmacology. PMID 35115937 · doi:10.3389/fphar.2021.790901
  Systematic safety review found cinnamon supplementation to be generally safe in clinical trial settings with no serious adverse events reported.
• Neto JCGL, Damasceno MMC, Ciol MA and others 2020. Analysis of the effectiveness of cinnamon (Cinnamomum verum) in the reduction of glycemic and lipidic levels of adults with type 2 diabetes: A study protocol. Medicine. PMID 31895796 · doi:10.1097/MD.0000000000018553
  Protocol for a Phase II double-blind, placebo-controlled trial of 3 grams/day Cinnamomum verum for 90 days in adults with type 2 diabetes; it reports no results.
• Silva ML, Bernardo MA, Singh J and others 2022. Cinnamon as a Complementary Therapeutic Approach for Dysglycemia and Dyslipidemia Control in Type 2 Diabetes Mellitus and Its Molecular Mechanism of Action: A Review. Nutrients. PMID 35807953 · doi:10.3390/nu14132773
  Reviewed molecular mechanisms of cinnamon’s antidiabetic activity: enhances insulin receptor signaling, increases GLUT4 translocation, activates AMPK pathway, and inhibits alpha-glucosidase.

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

• Ceylon cinnamon (C. verum) contains negligible coumarin (0.012-0.143 mg/g) compared to cassia cinnamon; German BfR established TDI of 0.1 mg coumarin/kg body weight to protect against hepatotoxicity
• Ceylon cinnamon classified as GRAS (Generally Recognized as Safe) by US-FDA; umbrella review of RCTs found no serious adverse events at supplemental doses
• HMPC (Committee on Herbal Medicinal Products of EMA) classified cinnamon bark as a traditional herbal medicinal product; caution advised for patients on diabetes or anticoagulant medications due to potential synergistic effects

What is it made of?

Key Active Markers

• Eugenol
• Linalool
• Coumarin
• Camphor
• Cinnamaldehyde
• Cinnamyl acetate
• Cinnamic acid
• Copane

Dosage forms and preparation

Dosage Forms: Churna (powder), Capsule, Tablet, Kwatha (decoction), Essential oil, Tincture, Softgel, Tea/Infusion

Standard Dosage: 1-3 g powder twice daily; 250-500 mg standardized extract twice daily; 1-2 drops essential oil in warm water

Optimal Timing: With or after meals for glycemic management; before meals for appetite stimulation; morning and evening dosing

Storage: Airtight containers at 15-25 deg C, protected from light and moisture. Essential oil in amber glass. Bark sticks have longer shelf life than ground powder. Cinnamaldehyde oxidizes on prolonged air exposure.

Marker Compounds: trans-Cinnamaldehyde, Cinnamyl acetate, Eugenol, Coumarin, Proanthocyanidin A2, Cinnamic acid, Linalool, beta-Caryophyllene, Cinnamyl alcohol

Synergistic Combinations

• Ela (cardamom) - digestive and flavor synergy
• Tejapatra - closely related Cinnamomum species
• Chromium picolinate - synergistic glycemic support
• Fenugreek (Methi) - complementary insulin-sensitizing action
• Gudmar (Gymnema) - blood sugar management combination