Sesamin

Sesamin at a Glance

Sesamin is the principal furofuran lignan of sesame seed and oil, also present in eleuthero and devil’s club. It is fat-soluble and heat-stable, so it survives cooking and refining.

It is one of the few lignans with real human effects: a modest lowering of total and LDL cholesterol in small trials, and an unusual second property — it inhibits the enzyme that degrades vitamin E, raising circulating gamma-tocopherol levels, which is why sesame products affect vitamin E status.

What It's Used For

Sesamin is the principal furofuran lignan of sesame seed and oil, also present in eleuthero and devil’s club. It is fat-soluble, tasteless and heat-stable, and its literature has two genuinely reproducible human threads. First, a modest lipid-lowering effect — small trials and their meta-analysis show reductions in total and LDL cholesterol ^{1Reference 1Sun Y et al. · 2022Meta-analysisEffects of sesamin supplementation on obesity, blood pressure and lipid profile: a systematic review and meta-analysis of RCTsView study →}.

Second, and most distinctive, a vitamin-E-sparing action: sesamin blocks the breakdown of tocopherols, raising blood γ-tocopherol — a real sesamin↔vitamin-E pharmacokinetic interaction ^{4,10Reference 4Parker RS et al. · 2000Cytochrome P450-3A-dependent metabolism of tocopherols and inhibition by sesaminView study →Reference 10Cooney RV et al. · 2001Effects of dietary sesame seeds on plasma tocopherol levelsView study →}.

Two disambiguations matter throughout: sesamin is not sesamol (a roasting-derived antioxidant phenol) or sesamolin (a related lignan), and commercial “sesame lignan” supplements are typically a ~1:1 mix of sesamin and its epimer episesamin, which is how most trials were dosed ^{5Reference 5Yasuda K et al. · 2012Comparison of the metabolism of sesamin and episesamin by drug-metabolising enzymes in human liverView study →}.

Evidence by IndicationStrength of support · Beta

Support is an experimental score — weighted by study type (human > animal > in vitro) and volume. A beta, not a validated metric. Human evidence is thin and mixture-based, so scores stay low by design. Each application links to its write-up.

01Lipid-loweringShaky42%Meta-analysis of small human RCTs + mechanism ^{1,13Reference 1Sun Y et al. · 2022Meta-analysisEffects of sesamin supplementation on obesity, blood pressure and lipid profile: a systematic review and meta-analysis of RCTsView study →Reference 13Tai TS et al. · 2019Sesamin, a naturally occurring lignan, inhibits ligand-induced lipogenesis through interaction with LXRα and PXRView study →}

02Antioxidant / vitamin-E-sparingShaky42%Human tocopherol-kinetics studies + clear mechanism ^{4,10,11Reference 4Parker RS et al. · 2000Cytochrome P450-3A-dependent metabolism of tocopherols and inhibition by sesaminView study →Reference 10Cooney RV et al. · 2001Effects of dietary sesame seeds on plasma tocopherol levelsView study →Reference 11Takemoto D et al. · 2015Sesame lignans and vitamin E supplementation improve subjective status and antioxidative capacity in healthy humans with daily fatigueView study →}

03Blood pressureShaky34%One small crossover RCT + meta-analysis subgroup ^{2,1Reference 2Miyawaki T et al. · 2009Antihypertensive effects of sesamin in humansView study →Reference 1Sun Y et al. · 2022Meta-analysisEffects of sesamin supplementation on obesity, blood pressure and lipid profile: a systematic review and meta-analysis of RCTsView study →}

04Hepatoprotective (NAFLD)Shaky20%Preclinical only (LXRα) ^{13Reference 13Tai TS et al. · 2019Sesamin, a naturally occurring lignan, inhibits ligand-induced lipogenesis through interaction with LXRα and PXRView study →}

05Anti-inflammatoryShaky18%Preclinical / mechanistic ^{8Reference 8Nakamura Y et al. · 2020ReviewSesame lignans reduce LDL oxidative susceptibility by downregulating platelet-activating-factor acetylhydrolaseView study →}

Mechanisms

Pharmacokinetics

Oral sesamin (usually as a ~1:1 sesamin/episesamin mix) peaks in plasma around 5 hours, reaching steady state by day 7 with once-daily dosing and no accumulation over 28 days ^{12Reference 12Tomimori N et al. · 2013Pharmacokinetics and safety of the sesame lignans sesamin and episesamin in healthy subjectsView study →}. It is extensively metabolized in the liver by CYP450 (chiefly CYP2C9 and CYP1A2) to mono- and di-catechol metabolites, then glucuronidated and O-methylated — and the routing differs measurably between sesamin and episesamin, giving different metabolite profiles ^{5,6Reference 5Yasuda K et al. · 2012Comparison of the metabolism of sesamin and episesamin by drug-metabolising enzymes in human liverView study →Reference 6Tomimori N et al. · 2012AnimalIdentification of the metabolites of episesamin in rat bile and human liver microsomesView study →}. Those catechol metabolites are themselves potent antioxidants and circulate in human plasma ^{12Reference 12Tomimori N et al. · 2013Pharmacokinetics and safety of the sesame lignans sesamin and episesamin in healthy subjectsView study →}. Note that episesamin is chiefly a processing/refining epimer of dietary sesame rather than a major in-vivo conversion product — supplements dose it directly. The load-bearing interaction is the tocopherol one: by inhibiting CYP3A-dependent tocopherol catabolism, sesamin lengthens tocopherol residence and raises plasma γ-tocopherol ^{4Reference 4Parker RS et al. · 2000Cytochrome P450-3A-dependent metabolism of tocopherols and inhibition by sesaminView study →}.

Clinical trials

Human data are real but thin, and center on lipids and blood pressure: a 2022 meta-analysis of 7 RCTs (n≈212) showing modest reductions in total cholesterol, LDL and systolic BP with no effect on HDL, triglycerides, diastolic BP or weight ^{1Reference 1Sun Y et al. · 2022Meta-analysisEffects of sesamin supplementation on obesity, blood pressure and lipid profile: a systematic review and meta-analysis of RCTsView study →}, plus a standalone BP crossover trial ^{2Reference 2Miyawaki T et al. · 2009Antihypertensive effects of sesamin in humansView study →}. The vitamin-E kinetics are demonstrated in small feeding studies ^{10Reference 10Cooney RV et al. · 2001Effects of dietary sesame seeds on plasma tocopherol levelsView study →} and a combination fatigue RCT ^{11Reference 11Takemoto D et al. · 2015Sesame lignans and vitamin E supplementation improve subjective status and antioxidative capacity in healthy humans with daily fatigueView study →}, and a Phase-I study established tolerability of 50 mg/day for 28 days ^{12Reference 12Tomimori N et al. · 2013Pharmacokinetics and safety of the sesame lignans sesamin and episesamin in healthy subjectsView study →}. There are no human trials for NAFLD, dedicated anti-inflammatory endpoints or ergogenic outcomes — those are preclinical, and several human trials are small, mixture-based and industry-sponsored.

Last checked: July 2026.

Toxicity & Safety

Sesamin is a low-toxicity dietary lignan, and its defining safety feature is an interaction rather than a side effect — it inhibits tocopherol breakdown and raises blood γ-tocopherol.

Safety at a Glance

✅ Low / no toxicityDrug interactions

• Low toxicity with a long dietary history. Phase-I dosing of 50 mg/day for 28 days produced no serious adverse events.
• Not the sesame allergen. Sesame allergy is to seed storage proteins, not the lignan — though a botanical extract could carry trace seed protein.
• Raises γ-tocopherol. The defining, demonstrated interaction is with vitamin E, via inhibited tocopherol catabolism.
• Theoretical CYP interactions. Involvement of CYP2C9, CYP1A2 and CYP3A suggests potential to affect co-metabolized drugs.
• Additive effects are plausible but unstudied. Blood-pressure and lipid-lowering medications are the obvious candidates.

Full Safety & Interactions Detail

Sesamin is a low-toxicity dietary lignan with a long history of consumption in sesame, and Phase-I dosing of 50 mg/day of sesame lignans for 28 days produced no serious adverse events ^{12Reference 12Tomimori N et al. · 2013Pharmacokinetics and safety of the sesame lignans sesamin and episesamin in healthy subjectsView study →}.

One clarification prevents a common misfiling: sesame is a major, sometimes anaphylactic, food allergen — but the allergens are seed storage proteins, not the lignan sesamin; purified sesamin is not a recognized allergen, though a botanically-sourced extract could in principle carry trace seed protein. The defining interaction is the vitamin-E one — sesamin raises γ-tocopherol by inhibiting tocopherol catabolism ^{4Reference 4Parker RS et al. · 2000Cytochrome P450-3A-dependent metabolism of tocopherols and inhibition by sesaminView study →}; its own CYP2C9/CYP1A2/CYP3A involvement suggests a theoretical potential to affect co-metabolized drugs ^{5Reference 5Yasuda K et al. · 2012Comparison of the metabolism of sesamin and episesamin by drug-metabolising enzymes in human liverView study →}, and additive effects with antihypertensive or lipid-lowering agents are plausible but unstudied. No reproductive-safety study of isolated or high-dose sesamin was located. Culinary sesame is a long-standing dietary exposure; a concentrated supplement is a different exposure and has not been assessed.

Dosage

There is no established therapeutic dose, and nothing here is a recommendation. Human trials used 50 mg/day of sesame lignans (1:1 sesamin/episesamin) for 28 days (pharmacokinetics/safety) ^{12Reference 12Tomimori N et al. · 2013Pharmacokinetics and safety of the sesame lignans sesamin and episesamin in healthy subjectsView study →}, 60 mg/day of sesamin for 4 weeks (blood pressure) ^{2Reference 2Miyawaki T et al. · 2009Antihypertensive effects of sesamin in humansView study →}, and a 10 mg lignan plus vitamin-E combination (fatigue) ^{11Reference 11Takemoto D et al. · 2015Sesame lignans and vitamin E supplementation improve subjective status and antioxidative capacity in healthy humans with daily fatigueView study →}; typical supplements provide 50–100 mg/day of “sesame lignans.” The tocopherol-sparing biomarker effect appears at very low intakes ^{10Reference 10Cooney RV et al. · 2001Effects of dietary sesame seeds on plasma tocopherol levelsView study →}.

References

1. Sun Y, Ren J, Zhu S, et al. (2022). Effects of sesamin supplementation on obesity, blood pressure and lipid profile: a systematic review and meta-analysis of RCTs. Frontiers in Endocrinology. https://pubmed.ncbi.nlm.nih.gov/35311241/
2. Miyawaki T, Aono H, Toyoda-Ono Y, et al. (2009). Antihypertensive effects of sesamin in humans. Journal of Nutritional Science and Vitaminology. https://pubmed.ncbi.nlm.nih.gov/19352068/
3. Shimizu S, et al. (1991). Sesamin is a potent and specific inhibitor of Δ5-desaturase in polyunsaturated-fatty-acid biosynthesis. Lipids. https://pubmed.ncbi.nlm.nih.gov/1943494/
4. Parker RS, et al. (2000). Cytochrome P450-3A-dependent metabolism of tocopherols and inhibition by sesamin. Biochemical and Biophysical Research Communications. https://pubmed.ncbi.nlm.nih.gov/11061988/
5. Yasuda K, Ikushiro S, Wakayama S, et al. (2012). Comparison of the metabolism of sesamin and episesamin by drug-metabolising enzymes in human liver. Drug Metabolism and Disposition. https://pubmed.ncbi.nlm.nih.gov/22752007/
6. Tomimori N, Nakai M, Ono Y, et al. (2012). Identification of the metabolites of episesamin in rat bile and human liver microsomes. Biological & Pharmaceutical Bulletin. https://pubmed.ncbi.nlm.nih.gov/22687406/
7. Umeda-Sawada R, Takahashi N, Igarashi O (1995). Interaction of sesamin and eicosapentaenoic acid against Δ5-desaturation and the n-6/n-3 ratio of essential fatty acids in rat. Bioscience, Biotechnology and Biochemistry. https://pubmed.ncbi.nlm.nih.gov/8611750/
8. Nakamura Y, Okumura H, Ono Y, et al. (2020). Sesame lignans reduce LDL oxidative susceptibility by downregulating platelet-activating-factor acetylhydrolase. European Review for Medical and Pharmacological Sciences. https://pubmed.ncbi.nlm.nih.gov/32141585/
9. Frank J (2005). Beyond vitamin-E supplementation: an alternative strategy to improve vitamin-E status. Journal of Plant Physiology. https://pubmed.ncbi.nlm.nih.gov/16008112/
10. Cooney RV, et al. (2001). Effects of dietary sesame seeds on plasma tocopherol levels. Nutrition and Cancer. https://pubmed.ncbi.nlm.nih.gov/11588904/
11. Takemoto D, Yasutake Y, Tomimori N, et al. (2015). Sesame lignans and vitamin E supplementation improve subjective status and antioxidative capacity in healthy humans with daily fatigue. Global Journal of Health Science. https://pubmed.ncbi.nlm.nih.gov/26153159/
12. Tomimori N, Tanaka Y, Kitagawa Y, et al. (2013). Pharmacokinetics and safety of the sesame lignans sesamin and episesamin in healthy subjects. Biopharmaceutics & Drug Disposition. https://pubmed.ncbi.nlm.nih.gov/24014208/
13. Tai TS, Tien N, Shen HY, et al. (2019). Sesamin, a naturally occurring lignan, inhibits ligand-induced lipogenesis through interaction with LXRα and PXR. Evidence-Based Complementary and Alternative Medicine. https://pubmed.ncbi.nlm.nih.gov/31976003/

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