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Resveratrol
Resveratrol is one of the most over-hyped supplements in the longevity world, and the human data does not match the marketing.
- Evidence
- Mixed Evidence
- Category
- Heart & Cardiovascular
- Best form
- Trans-resveratrol from Polygonum cuspidatum (Japanese knotweed), standardized to 50% or 98% trans-isomer
- Effective dose
- 150-500mg daily of trans-resveratrol (read labels carefully - many products list total resveratrol but only half is the active trans-isomer)
- Lab tested
- 5 of 10 products
- Category
- Heart & Cardiovascular
- Best form
- Trans-resveratrol from Polygonum cuspidatum (Japanese knotweed), standardized to 50% or 98% trans-isomer
- Effective dose
- 150-500mg daily of trans-resveratrol (read labels carefully - many products list total resveratrol but only half is the active trans-isomer)
- Lab tested
- 5 of 10 products
Key takeaways
- →The longevity hype did not translate. Human trials show no consistent SIRT1 activation and no lifespan data. Animal-only finding.
- →Modest cardiometabolic effects are real: small HOMA-IR drops in T2DM, ~1.4 point FMD gain, ~12 mmHg SBP drop at 150mg+.
- →Bioavailability is awful (under 5 ng/mL unchanged in plasma) and pushing past 1g/day causes GI side effects with no extra benefit.
- →If you train regularly, skip it. One solid trial showed resveratrol blunted exercise-induced cardiovascular adaptations in older men.
What Is Resveratrol?
Resveratrol is one of the most over-hyped supplements in the longevity world, and the human data does not match the marketing. The whole "red wine extends lifespan" narrative came out of yeast and mouse studies showing SIRT1 activation and lifespan extension. None of that has been shown in humans. A recent systematic review found no significant impact on SIRT1 gene expression, protein levels, or serum SIRT1 in human trials, and the original sirtuin-activator assays were later shown to contain fluorescence artifacts. If you bought resveratrol because David Sinclair's books made it sound like a longevity miracle, that part of the story did not translate.
What does hold up is more modest. Meta-analyses in type 2 diabetes show small but real reductions in fasting glucose, fasting insulin, and HOMA-IR, particularly at doses above 100mg/day. Endothelial function improves on flow-mediated dilation by about 1.4 percentage points across 17 trials. Systolic blood pressure drops about 12 mmHg at doses of 150mg/day or higher in a 6-trial meta-analysis, with no diastolic effect. These are real, but they are cardiometabolic effects in people who already have metabolic problems, not anti-aging effects in healthy adults.
The bigger problem is bioavailability. Walle's classic 2004 pharmacokinetic study used a 25mg oral dose and found at least 70% absorption but only trace amounts (under 5 ng/mL) of unchanged trans-resveratrol in plasma. Sulfate and glucuronide conjugation in the gut wall and liver shred the parent compound before it reaches systemic circulation. So most of what you measure in blood is metabolites, not resveratrol itself. Whether those metabolites do anything useful is still being argued.
Pushing the dose to overcome bioavailability runs into a different wall. Brown and Patel's 29-day repeat-dose trial in healthy volunteers (0.5g, 1g, 2.5g, 5g daily) found mild to moderate GI side effects (nausea, diarrhea, abdominal pain) at the 2.5g and 5g levels. The authors recommended future studies cap dosing at 1g/day. That is the practical ceiling.
One specific warning worth flagging: a well-conducted 2013 trial by Gliemann et al. found that resveratrol blunted the cardiovascular adaptations to exercise training in older men. The placebo plus exercise group saw a 4.8 mmHg drop in mean arterial pressure and a 45% greater VO2 max increase than the resveratrol plus exercise group, and resveratrol abolished the LDL and triglyceride improvements. If you train, this is a reason to skip it.
Finally, label literacy matters more here than for most supplements. A bottle marked "500mg resveratrol" sourced from 50% Polygonum cuspidatum extract is delivering 250mg of trans-resveratrol. The 98% pure trans products (Doctor's Best 600mg, Veri-te-based products) are honest about the active dose. Cheap blends often are not.
Does It Work? The Evidence
How A-F grades workInsulin sensitivity and glycemic control in type 2 diabetes
Zhu 2017 meta-analysis of 9 RCTs (n=283): fasting glucose -0.29 mmol/L, fasting insulin -0.64 U/mL, significant HOMA-IR reduction; HbA1c effect negligible. Stronger effects at doses ≥100mg/day.
Endothelial function (flow-mediated dilation)
Mohammadipoor 2022 meta-analysis (17 RCTs, 21 arms): FMD improved by 1.43 percentage points (95% CI 0.98-1.88, p<0.001); ICAM-1 reduced by 7.09 ng/mL.
Systolic blood pressure reduction
Liu 2015 meta-analysis (6 RCTs, n=247): high-dose (≥150mg/day) reduced SBP by 11.90 mmHg (95% CI -20.99 to -2.81); no effect on diastolic; no effect at lower doses.
Longevity / sirtuin (SIRT1) activation in humans
Yeast, worm, fly, and mouse SIRT1 overexpression extends lifespan. In humans, recent systematic reviews find no consistent effect on SIRT1 gene expression, protein expression, or serum SIRT1. Original sirtuin-activator assays involved fluorescence artifacts.
Exercise performance and training adaptations
Gliemann 2013 RCT in aged men: resveratrol blunted exercise-induced reductions in MAP, abolished LDL/triglyceride improvements, and resulted in 45% lower VO2 max gains vs placebo. Smaller trials show inconsistent results.
| Grade | Claimed Benefit | Key Studies | Our Verdict |
|---|---|---|---|
| B | Insulin sensitivity and glycemic control in type 2 diabetes | Zhu 2017 meta-analysis of 9 RCTs (n=283): fasting glucose -0.29 mmol/L, fasting insulin -0.64 U/mL, significant HOMA-IR reduction; HbA1c effect negligible. Stronger effects at doses ≥100mg/day. | Early Signal |
| B | Endothelial function (flow-mediated dilation) | Mohammadipoor 2022 meta-analysis (17 RCTs, 21 arms): FMD improved by 1.43 percentage points (95% CI 0.98-1.88, p<0.001); ICAM-1 reduced by 7.09 ng/mL. | Early Signal |
| C | Systolic blood pressure reduction | Liu 2015 meta-analysis (6 RCTs, n=247): high-dose (≥150mg/day) reduced SBP by 11.90 mmHg (95% CI -20.99 to -2.81); no effect on diastolic; no effect at lower doses. | Early Signal |
| D | Longevity / sirtuin (SIRT1) activation in humans | Yeast, worm, fly, and mouse SIRT1 overexpression extends lifespan. In humans, recent systematic reviews find no consistent effect on SIRT1 gene expression, protein expression, or serum SIRT1. Original sirtuin-activator assays involved fluorescence artifacts. | Not There Yet |
| C | Exercise performance and training adaptations | Gliemann 2013 RCT in aged men: resveratrol blunted exercise-induced reductions in MAP, abolished LDL/triglyceride improvements, and resulted in 45% lower VO2 max gains vs placebo. Smaller trials show inconsistent results. | Conflicted |
How to Choose: Forms, Doses & What Matters
Clinical dose: 150-500mg daily of trans-resveratrol (read labels carefully - many products list total resveratrol but only half is the active trans-isomer)
Best forms: Trans-resveratrol from Polygonum cuspidatum (Japanese knotweed), standardized to 50% or 98% trans-isomer, Veri-te (Evolva/Lallemand) yeast-fermented trans-resveratrol, >98% purity, EU Novel Food and self-affirmed GRAS, Bioavailability-enhanced formats: VESIsorb, hydrogel-coated, or paired with quercetin/piperine
Take 150-500mg of trans-resveratrol daily with a fat-containing meal - fat increases the limited absorption. Stay below 1g/day to avoid GI side effects (nausea, diarrhea, cramping). Trans-resveratrol degrades when exposed to light and air, so keep the bottle closed and stored away from sunlight. If your bottle says '500mg resveratrol' but lists a 50% Polygonum cuspidatum extract, you are getting 250mg of the active trans-isomer - adjust accordingly. Effects on glucose and BP take 8-12 weeks of consistent dosing to show in trials. Pairing with quercetin or piperine is a common bioavailability hack but the human evidence for those combinations is thin.
Who Should Take Resveratrol?
Adults with type 2 diabetes or insulin resistance looking for a small adjunct to standard care (talk to your endocrinologist first). People with metabolic syndrome or early cardiovascular risk seeking modest endothelial and blood pressure support. Those who want a polyphenol antioxidant and have realistic expectations about what 'support' actually means in terms of effect size.
Who Should Avoid It?
Not for everyone
Side Effects & Safety
Product Scores
10 products scored on dosing accuracy, third-party testing, cost per effective dose, and label transparency.
The Scorecard: 10 Products Compared
Trans Resveratrol 600mg
Doctor's Best$29.99 ÷ 60 days at 600mg/day (1 serving × 600mg)
One of the few products that delivers 98% trans-isomer rather than burying it inside a 50% blend
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Optimized Resveratrol Elite
Life Extension$32.99 ÷ 60 days at 222mg/day (1 serving × 222mg)
If you accept the bioavailability problem as the limiting factor, this format addresses it directly
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
ResveraCel (NR + Trans-Resveratrol)
Thorne$41.00 ÷ 29 days at 150mg/day (1 serving × 150mg)
This is really an NR product with resveratrol added rather than a resveratrol-first supplement
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Natural Resveratrol 200mg
NOW Foods$15.99 ÷ 123 days at 200mg/day (1 serving × 200mg)
If you want to start at the low end of the clinical dose range without overpaying, this is the entry point
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Resveratrol 500mg
Reserveage Beauty
$35.99 ÷ 120 days at 500mg/day (1 serving × 500mg)
Reserveage is the brand most associated with the resveratrol category and offers honest trans-isomer dosing
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Resveratrol VESIsorb
Pure Encapsulations$38.40 ÷ 45 days at 100mg/day (1 serving × 100mg)
Best fit for people with sensitivities who want the cleanest-label resveratrol available
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Resveratrol Supreme
Designs for Health
$38.99 ÷ 60 days at 200mg/day (1 serving × 200mg)
Practitioner-channel formulation with quercetin co-factor at a real dose
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Resveratrol 100mg
Jarrow Formulas$15.49 ÷ 119 days at 100mg/day (1 serving × 100mg)
Fine starter product if you want to test tolerability before committing to a larger dose
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Resveratrol 500mg
Double Wood Supplements$17.95 ÷ 90 days at ~167mg/day (0.7 servings × 250mg)
Honest trans-isomer disclosure once you read past the front label, with strong value
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Resveratrol 1000mg Capsules
BulkSupplements
$19.96 ÷ 100 days at ~301mg/day (0.3 servings × 1000mg)
Highest absolute mg per serving on this list, but you are taking it on faith that the trans content is meaningful
Prices checked 2026-04-25. Cost shown is per clinically effective daily dose, not per pill.
Full Comparison
| Category | Trans Resveratrol 600mg Doctor's Best | Optimized Resveratrol Elite Life Extension | ResveraCel (NR + Trans-Resveratrol) Thorne | Natural Resveratrol 200mg NOW Foods | Resveratrol 500mg Reserveage Beauty | Resveratrol VESIsorb Pure Encapsulations | Resveratrol Supreme Designs for Health | Resveratrol 100mg Jarrow Formulas | Resveratrol 500mg Double Wood Supplements | Resveratrol 1000mg Capsules BulkSupplements |
|---|---|---|---|---|---|---|---|---|---|---|
| Brand Score | 89/100Winner | 84/100 | 82/100 | 81/100 | 80/100 | 79/100 | 78/100 | 75/100 | 73/100 | 72/100 |
| Dosing & Form | 25/25Winner | 19/25 | 14/25 | 19/25 | 22/25 | 14/25 | 19/25 | 13/25 | 16/25 | 19/25 |
| Purity | 19/25 | 19/25 | 25/25Winner | 19/25 | 16/25 | 22/25 | 16/25 | 19/25 | 16/25 | 16/25 |
| Value | 22/25 | 19/25 | 13/25 | 23/25Winner | 19/25 | 13/25 | 16/25 | 23/25 | 22/25 | 22/25 |
| Transparency | 23/25Winner | 23/25 | 23/25 | 20/25 | 19/25 | 23/25 | 20/25 | 20/25 | 19/25 | 16/25 |
| Cost/Day | $0.50 | $0.55 | $1.40 | $0.13Winner | $0.30 | $0.85 | $0.65 | $0.13 | $0.20 | $0.20 |
| Dose/Serving | 600mg | 222mg | 150mg | 200mg | 500mg | 100mg | 200mg | 100mg | 250mg | 1000mg |
| Form | 98% Trans-Resveratrol from Polygonum cuspidatum | Trans-Resveratrol with hydrogel coating + quercetin phytosome | Trans-Resveratrol + Nicotinamide Riboside + Quercetin Phytosome + Betaine | Trans-Resveratrol from Polygonum cuspidatum + Red Wine Extract | Trans-Resveratrol from Japanese knotweed (sustained-release) | ResVida Trans-Resveratrol (99%) in VESIsorb delivery system | Trans-Resveratrol from Polygonum cuspidatum (50% standardization) + Quercetin | Trans-Resveratrol from Polygonum cuspidatum (~90% trans) + Vitamin C | Polygonum cuspidatum (50% trans-resveratrol) | Resveratrol from Polygonum cuspidatum (trans-isomer % not specified) |
| Third-Party Tested | ✓ Yes | ✓ Yes | ✓ Yes | No | No | ✓ Yes | No | No | ✓ Yes | No |
| Proprietary Blend | No | No | No | No | No | No | No | No | No | No |
Frequently Asked Questions
Does resveratrol actually work for longevity?
In yeast, worms, flies, and mice - yes, SIRT1 activation extends lifespan. In humans - no evidence. Recent systematic reviews find no consistent effect on SIRT1 gene expression, protein levels, or serum SIRT1 in human trials. There is no human lifespan data because no one has run a multi-decade trial, and the surrogate markers we can measure do not move in the way the animal models predicted. The original 'sirtuin activator' screening assays were also shown to contain fluorescence artifacts. If you are taking it for longevity, you are extrapolating from mouse data to humans, which is a leap the human trials have not justified.
Why is resveratrol bioavailability so poor?
Walle's 2004 pharmacokinetic study found at least 70% absorption from a 25mg oral dose, but only trace amounts (under 5 ng/mL) of unchanged trans-resveratrol in plasma. The cause is extremely rapid sulfate and glucuronide conjugation in the gut wall and liver, which transforms resveratrol into metabolites before it reaches systemic circulation. Most of what circulates in your blood after a dose is conjugated metabolites, not resveratrol itself. Whether those metabolites are biologically active is still debated. This is why bioavailability-enhanced formats (VESIsorb, hydrogel-coated, micronized) have emerged, though the comparative human data on whether they actually deliver more biological effect is limited.
What is the difference between trans-resveratrol and cis-resveratrol?
Resveratrol exists in two geometric forms: trans (the all-active form studied in clinical trials) and cis (less biologically active, formed when trans-resveratrol is exposed to UV light). All the meaningful clinical evidence is on trans-resveratrol. A product that lists '500mg resveratrol' from a 50% Polygonum cuspidatum extract is delivering 250mg of trans-isomer plus other stuff. The 98% pure trans products are honest about the active dose. Keep your bottle out of direct sunlight to slow trans-to-cis conversion.
Resveratrol vs pterostilbene - which is better?
Pterostilbene is a structural cousin of resveratrol with two methyl groups added, which gives it dramatically better bioavailability (about 80% versus under 5%). Animal studies suggest pterostilbene is more potent on a mg-per-mg basis. The catch is that pterostilbene has a much smaller human evidence base - a few small RCTs, no large meta-analyses. Resveratrol has weaker bioavailability but a deeper clinical literature for cardiometabolic outcomes. Some products combine the two (Reserveage Resveratrol with Pterostilbene). Neither has demonstrated longevity benefits in humans.
Should I take resveratrol with food or on an empty stomach?
With food, specifically a meal containing some fat. Fat improves the limited absorption, and food reduces the GI symptoms that show up at higher doses. Trans-resveratrol is also degraded by light and air, so taking it with a meal (rather than letting capsules sit out) helps preserve the active form.
Why do products vary so much in price for the same dose?
Three drivers. First, source extract: 50% Polygonum cuspidatum is cheaper than 98% pure trans-resveratrol, but you need twice as much for the same active dose. Second, branded ingredients: Veri-te (yeast-fermented, GRAS, EU Novel Food approved) and ResVida cost more than commodity extracts. Third, delivery systems: VESIsorb, hydrogel coating, and bioavailability-enhanced formulations command a premium. Always look at the trans-resveratrol mg per serving, not the total resveratrol claim, and divide by price.
Is it true that resveratrol can interfere with exercise benefits?
There is one well-conducted trial (Gliemann et al. 2013, Journal of Physiology) where 27 older men doing 8 weeks of high-intensity exercise training were randomized to 250mg resveratrol or placebo. The placebo group got the cardiovascular benefits you would expect: 4.8 mmHg drop in mean arterial pressure, improvements in LDL and triglycerides, and a 45% greater VO2 max gain. The resveratrol group lost most of those gains. The hypothesis is that exercise-induced oxidative stress is part of the signal that drives adaptation, and resveratrol's antioxidant activity blunts that signal. The finding has been debated and other smaller trials show different results, but if you train hard, this is a reason to skip resveratrol.
Sources
- Zhu X, et al. Effects of resveratrol on glucose control and insulin sensitivity in subjects with type 2 diabetes: systematic review and meta-analysis. Nutr Metab (Lond). 2017;14:60.
- Liu Y, et al. Effect of resveratrol on blood pressure: a meta-analysis of randomized controlled trials. Clin Nutr. 2015;34(1):27-34.
- Mohammadipoor N, et al. Resveratrol supplementation efficiently improves endothelial health: A systematic review and meta-analysis of randomized controlled trials. Phytother Res. 2022;36(9):3529-3539.
- Walle T, et al. High absorption but very low bioavailability of oral resveratrol in humans. Drug Metab Dispos. 2004;32(12):1377-82.
- Brown VA, Patel KR, et al. Repeat dose study of the cancer chemopreventive agent resveratrol in healthy volunteers: safety, pharmacokinetics, and effect on the insulin-like growth factor axis. Cancer Res. 2010;70(22):9003-11.
- Gliemann L, et al. Resveratrol blunts the positive effects of exercise training on cardiovascular health in aged men. J Physiol. 2013;591(20):5047-59.
- Rogina B, Tissenbaum HA. SIRT1, resveratrol and aging. Front Genet. 2024;15:1393181.
- Memorial Sloan Kettering Cancer Center. Resveratrol - About Herbs.
- NIH LiverTox Clinical and Research Information on Drug-Induced Liver Injury. Resveratrol.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.