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Sesame seeds: heavy on copper, light on proof

Pooling seven randomized trials, sesame changed no part of the blood lipid profile. LDL moved by a standardized 0.16 downward with a 95% confidence interval running from 0.50 lower to 0.18 higher, and HDL, total cholesterol and triglycerides were flat too. Most of the trials in that pool used sesame oil, sesamin capsules or isolated lignans instead of the seed, and the authors grade their own evidence for every lipid, and for blood pressure, as very low certainty. A second 2025 meta-analysis, in 435 adults with raised or borderline blood pressure, reported falls of 20.8 mmHg systolic and 16.3 mmHg diastolic. No food plausibly does that, and heterogeneity near 99 percent means the pooled trials were measuring different things. Those two pooled results contradict each other, so treat the blood pressure figure as an open argument inside the evidence and not as something to expect from a jar of seeds. The caution that matters on this page is not about lipids at all. Sesame is the ninth major allergen in the United States and has had to be declared on labels since 1 January 2023. In blinded oral challenges the lowest dose that triggered a reaction was 30 mg of seed.

Every statement here is tied to a source. The badge says what kind of evidence stands behind it: A is a meta-analysis or systematic review, E is the position of an expert body without its own analysis. How we verify →

The numbers, per 3.5 oz (100 g)

USDA entrykcalProteinFatCarbsFiber
Sesame seeds, whole, dried57317.7 g49.7 g23.4 g11.8 g
Seeds, sesame seeds, whole, roasted and toasted56517 g48 g25.7 g14 g

These are the USDA entries that are sesame seeds, not foods made from it; they differ in cut, part, pack or preparation. Linked names have a page with the full profile and per-portion figures.

As people eat it, per 3.5 oz (100 g)

As eatenkcalProteinFatCarbsFiber
Sesame seeds63120.4 g61.2 g11.7 g11.6 g

USDA Food and Nutrient Database for Dietary Studies (FNDDS, release 2024-10-31): sesame seeds as it is prepared and served, from the recipes behind the national dietary survey, rather than a single laboratory sample.

How much is actually in it

What a real portion looks like

What your body absorbs

What cooking and storage change

What it does to your health

Safety, limits and interactions

What people believe that the data does not support

Who this works differently for

What is still unknown

The bottom line

Whole seed at a real dose is a separate question from a capsule. In 24 postmenopausal women, 1.8 oz (50 g) of sesame seed powder a day for five weeks cut total cholesterol by 5 percent, LDL by 10 percent and oxidized LDL by 23 percent against rice powder. That is around 300 calories of seed, roughly double the 28 g that US survey coding assumes when no quantity is recorded. In 38 hyperlipidemic patients on unchanged drug treatment, 40 g a day for 60 days lowered total cholesterol, LDL and the total to HDL ratio. That trial took 240 calories out of the rest of the diet, so replacement is part of what was measured, and the abstract gives direction and significance without effect sizes or confidence intervals. At 25 g a day for four weeks in 16 postmenopausal women the seed was absorbed, urinary lignan output reached 65.1 to 81.0 micromol a day, and plasma lipids did not move. Grinding is not needed for that absorption to happen. Per 100 g the dried seed carries 4.082 mg of copper, 454 percent of the Daily Value, which comes to about 127 percent on the 28 g that coders default to. The UK table gives 1.46 mg per 3.5 oz (100 g) under the same name, 64 percent away from the US figure, a gap too wide for method error and most likely hulled seed against unhulled. Roasting is gentle by the USDA retention table, which is dated 1975 and written for the whole roasted nut and seed group rather than for sesame by name: iron, magnesium, zinc and copper survive intact, while phosphorus and folate lose about a fifth. Calcium is the exception to the mineral story. In nine women a single 400 mg calcium load from sesame produced no acute change in calcium metabolism, while the same load from cheese or a calcium salt lowered parathyroid hormone and raised urinary calcium by 141 and 75 percent. The caution that matters most on this page is allergy. Sesame became the ninth major allergen in the United States and has had to be declared on packaged food and supplements since 1 January 2023. In blinded oral challenges the lowest dose that triggered a reaction was 30 mg of seed, a threshold built on twelve positive sesame challenges that describes the most sensitive patient rather than a typical one. Respiratory symptoms appeared in 42 percent of those challenges, and five of the six challenges to sesame oil in the same series were positive, with 0.2 and 1 tsp (1 and 5 mL) causing anaphylactic shock. A review of 210 provocation studies and case reports found no fatal reaction below 5 mg of allergen protein, and sesame sits on its list of allergens that have caused severe reactions below that dose. A 2026 review puts IgE-mediated sesame allergy at roughly 0.1 to 0.2 percent of people, without naming the source of that figure. Among 122 children at three European clinics who were already allergic to a nut or to sesame, 60.7 percent reacted to more than one of peanut, tree nuts and sesame on challenge. That is a share among already allergic children and not a population rate. Aflatoxin B1 was present in 28.93 percent of sesame samples across the world literature, and the authors modeled exposure as leaving consumers in nearly all the studied countries at what they call unacceptable health risk, with margins of exposure well below the 10000 threshold. The sampled countries were led by Nigeria, Egypt and Pakistan, so the number does not carry over to European retail. No randomized trial has tested whole sesame seed against a hard clinical endpoint, and we found nothing on the kidneys and nothing on how the allergy threshold changes with a child age.

Questions about sesame seeds, answered from the trials

Related foods

More from the same food group (nut and seed products)

Guides that discuss this food

Sources

  1. sesd-daily-r3-01 · food composition dataset
    copper 4.082 mg 454% DV · from 2 records 2.47–4.082
    USDA FoodData Central, SR Legacy, FDC 170150 · checked 2026-09-25
  2. sesd-daily-r3-02 · food composition datasets
    copper USDA 4.082 / CoFID 1.46 mg difference 64% ← DISCREPANCY
    USDA FoodData Central SR Legacy FDC 170150 and CoFID 2021, Public Health England, OGL v3.0, code 14-844 · checked 2026-09-25
  3. sesd-daily-r3-04 · dietary survey portion dataset
    1 cup · 10205 128
    USDA FNDDS, food code 43103000, FDC 2707586 · checked 2026-09-25
  4. sesd-daily-r3-05 · randomized crossover trial
    In a randomized crossover study, healthy postmenopausal women supplemented their diets with the bars for 4 wk each separated by 4-wk washout periods, and urinary mammalian lignan excretion was measured at baseline and after 4 wk as a marker of mammalian lignan production. Results showed an increase with all treatments (65.1-81.0 mumol/day; P < 0.0001), which did not differ among treatments.
    Nutr Cancer, 2005 · checked 2026-09-25
  5. sesd-daily-r3-06 · randomized crossover trial
    In a randomized crossover study, 16 postmenopausal women supplemented their diets with food bars containing either 25 g unground flaxseed, sesame seed, or their combination (12.5 g each) (flaxseed+sesame seed bar, FSB) for 4 wk each, separated by 4 wk washout periods. ... In conclusion, fatty acids and lignans from unground seed in food bars are absorbed and metabolized; however, except for serum GT, the 25 g unground seed is inadequate to induce changes in plasma lipids and several biomarkers of oxidative stress.
    Mol Nutr Food Res, 2009 · checked 2026-09-25
  6. sesd-daily-r3-07 · randomized crossover meal study
    Four hundred milligrams calcium from either Emmental cheese, milk, sesame seeds, spinach, or calcium salt (calcium lactate gluconate + calcium carbonate) or no additional calcium (control session) were given to nine female volunteers immediately after a first blood sample (at 0900) in random order with a light standardized meal containing 37 mg Ca. ... Our results show that calcium from sesame seeds and spinach does not cause an acute response in calcium metabolism.
    Am J Clin Nutr, 1997 · checked 2026-09-25
  7. sesd-daily-r3-03 · nutrient retention factor table
    phosphorus_mg 80% 20%
    USDA Table of Nutrient Retention Factors, Release 6 (2007), Retn_Code 2203 · checked 2026-09-25
  8. sesd-daily-r3-11 · randomized controlled trial
    This study was designed to investigate the effects of sesame on reducing serum lipids and enhancing antioxidant capacity in 38 hyperlipidemic patients who were divided into two groups randomly. ... Intervention group patients were supposed to eat 40 g white sesame seeds daily, and instead of these calories, 240 kcal was removed from their diet. ... The results showed that the diet with sesame significantly decreased the levels of serum total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) and TC/HDL-C ratio.
    Int J Food Sci Nutr, 2012 · checked 2026-09-25
  9. ev-seshair-06 · controlled oral food challenge
    The lowest reactive threshold has been observed at less than 2 mg of egg; 5 mg of peanut, 0.1 mL of milk and 30 mg of sesame seed.
    Clin Exp Allergy, 2003 · checked 2026-10-07
  10. sesd-daily-r3-13 · controlled oral food challenge
    Data from 125 positive oral challenges to egg, 103 to peanut, 59 to milk and 12 to sesame seeds were analysed. ... The lowest reactive threshold has been observed at less than 2 mg of egg; 5 mg of peanut, 0.1 mL of milk and 30 mg of sesame seed.
    Clin Exp Allergy, 2003 · checked 2026-09-25
  11. sesd-daily-r3-14 · position paper with systematic review
    In the 210 studies included, in our search, no reports of fatal anaphylactic reactions reported below 5 mg protein ingested were identified. However, in provocation studies and case reports, severe reactions below 5 mg were reported for the following allergens: eggs, fish, lupin, milk, nuts, peanuts, soy, and sesame seeds.
    Allergy, 2022 · checked 2026-09-25
  12. sesd-daily-r3-15 · meta-analysis of contamination surveys
    The pooled prevalence order was AFB1 (28.93%) > AFB2 (18.09%) > AFG2 (10.80%) > AFG1 (9.95%), while concentration order was AFG1 (32.290 µg/kg) > AFB1 (28.302 µg/kg) > AFB2 (3.183 µg/kg) > AFG2 (0.131 µg/kg). ... Monte Carlo simulation indicated consumers in nearly all studied countries face unacceptable health risk, with MOE values well below 10,000.
    Mycotoxin Res, 2026 · checked 2026-09-25
  13. sesd-daily-r3-08 · meta-analysis of RCTs
    The analysis of seven studies examining the effect of sesame supplements on HDL concluded that no significant effect was observed (SMD = 0.21; 95% CI − 0.06, 0.48; P = 0.121). ... The meta-analysis showed no substantial impact on LDL (SMD = − 0.16; 95% CI − 0.50, 0.18; P = 0.347), with moderate heterogeneity observed among these studies (I2 = 50%, P = 0.062).
    Nutrition & Metabolism, 2025 · checked 2026-09-25
  14. sesd-daily-r3-12 · agency labeling rule
    As of January 1, 2023, sesame must be labeled as an allergen on packaged foods and dietary supplements.
    US FDA, FASTER Act: Sesame as the Ninth Major Food Allergen · checked 2026-09-25
  15. sesd-daily-r3-17 · systematic review
    However, despite its widespread culinary and industrial applications, sesame has emerged as a growing allergenic concern, eliciting IgE-mediated reactions in approximately 0.1-0.2 % of the population.
    Food Chem, 2026 · checked 2026-09-25
  16. ev-seshair-03 · meta-analysis of observational studies
    Vitamin D deficiency was strongly associated to an elevated risk of AA (OR = 2.48, 95% CI = 1.47-4.17, p < 0.05).
    J Cosmet Dermatol, 2025 · checked 2026-10-07
  17. ev-seshair-04 · meta-analysis of observational studies
    However, there was no significant difference between the AA patients and controls in the levels of serum copper (P = 0.81), serum iron (P = 0.36), serum ferritin (P = 0.37) and serum magnesium (P = 0.07).
    J Dermatol, 2017 · checked 2026-10-07
  18. ev-seshair-07 · prospective cohort
    Overall, the rate of coexistent peanut, tree nut, and sesame seed allergy was 60.7% (n = 74/122; 95% CI, 51.4% to 69.4%).
    J Allergy Clin Immunol, 2020 · checked 2026-10-07
  19. sesd-daily-r3-09 · meta-analysis of controlled trials
    Participant ages in intervention groups ranged from 35 to 60 years, with sesame doses varying from 60 to 35,000 mg/day over intervention durations of 4 to 8 weeks. ... Based on our findings, the incorporation of sesame as a dietary supplement conferred significant beneficial effects on DBP (WMD, −16.29 mmHg; 95% CI, −25.37 to −7.22; P < 0.001; I2 = 98.7%; P heterogeneity < 0.001) (Supplementary Fig. 2) and SBP (WMD, −20.78 mmHg; 95% CI, −32.26 to −9.31; P < 0.001; I2 = 98.5%; P heterogeneity < 0.001).
    Clinical Hypertension, 2025 · checked 2026-09-25
  20. sesd-daily-r3-10 · randomized crossover trial
    Twenty-six healthy subjects attended, and 24 completed, this randomized, placebo-controlled, crossover study. Half of them consumed 50 g sesame seed powder daily for 5 wk, followed by a 3-wk washout period, then a 5-wk 50-g rice powder placebo period. ... After sesame treatment, plasma total cholesterol (TC), LDL-C, the ratio of LDL-C to HDL-C, thiobarbituric acid reactive substances in oxidized LDL, and serum dehydroepiandrosterone sulfate decreased significantly by 5, 10, 6, 23, and 18%, respectively.
    J Nutr, 2006 · checked 2026-09-25
  21. sesd-daily-r3-16 · prospective multicentre prevalence study
    Overall, the rate of coexistent peanut, tree nut, and sesame seed allergy was 60.7% (n = 74/122; 95% CI, 51.4% to 69.4%).
    J Allergy Clin Immunol, 2020 · checked 2026-09-25
  22. ev-seshair-01 · systematic review
    No diet-based interventional studies met inclusion criteria.
    JAMA Dermatol, 2023 · checked 2026-10-07
  23. ev-seshair-02 · in vitro study
    Cell assays revealed that 10-80 µM sesamin reversed DHT-induced p38 phosphorylation, normalized AR expression, down-regulated pro-apoptotic BAX, restored anti-apoptotic BCL2, and elevated WNT10B.
    Scientific Reports, 2026 (Li et al.) · checked 2026-10-07
  24. ev-seshair-05 · systematic review
    Higher levels of vitamin D and iron were inversely related to alopecia.
    Nutr Health, 2026 · checked 2026-10-07
  25. sesd-daily-r3-18 · GRADE assessment
    The quality of evidence was reported very low for DBP, SBP, FBS, Insulin, TNF-a, HDL, LDL, TC, TG, MDA, and TAC and was reported low for BF, BMI, Weight, WHR, and HOMA-IR except for HC, WC, HbA1c, CRP, and IL-6 that was moderate.
    Nutrition & Metabolism, 2025 · checked 2026-09-25

Review. Reviewed on 2026-09-25 for evidence level, dose and population context, and claims a reader could misread. Bioma Learn has no human medical reviewer at this time, and we say so rather than invent one. Methodology. This is information, not medical advice.