Supplement: Resveratrol

What It Is

Resveratrol is a compound that grapevines and a few other plants make when injured or attacked by fungus. It belongs to the stilbene family of plant polyphenols and turns up in grape skins, red wine, peanuts, and some berries, usually in small amounts.

Most people first met resveratrol through the French paradox, a term popularized in 1992: some wine-drinking populations had less heart disease than their rich diets predicted. Supplement makers then sold it on the promise of slower aging.

Anatomy of the Practice

1In the test tube and the cell

Resveratrol does many things to cells in a dish: it influences the sirtuin enzymes, dampens some inflammatory signals, and acts as an antioxidant. These are the effects the reputation was built on, and they hold up in the test tube. They are only a starting point.

2On the way through the gut and liver

Swallowed resveratrol is absorbed well, but the gut wall and liver chemically alter most of it within the first pass. Very little reaches the bloodstream as the original molecule, so a capsule delivers less active compound than the amount absorbed suggests.

3Where measured effects do turn up

Despite the low blood levels, human trials do register real changes, but almost always in people who started with something to correct: high blood sugar, or high blood pressure. In people who were already healthy, little moved. These effects are specific to those groups, not the whole-body anti-aging benefit once advertised.

How It Works

The sirtuins, a family of enzymes, help regulate metabolism and the stress response inside cells. In 2003 a laboratory study reported that resveratrol activates SIRT1 and extends the lifespan of yeast. Later work in the same line reported longer life in worms, flies, and fish. The pitch was simple. Calorie restriction reliably extends life in many animals, partly through sirtuins, and here was a wine molecule that seemed to copy the effect without the diet. That idea launched the supplements and the popular science books.

The mechanism did not hold up. A 2010 study found that resveratrol did not directly activate SIRT1 once a fluorescent tag was removed from the test peptide. The original activation looks partly like an artifact of how the enzyme was measured. Researchers still debate how resveratrol affects sirtuins, and it clearly shifts cell metabolism. The confident claim that it directly activates a sirtuin has weakened, and that was the one clean mechanism the anti-aging case rested on.

Bioavailability is the deeper problem. When six volunteers took a 25 mg oral dose of labeled resveratrol, at least 70% was absorbed. Yet the unchanged resveratrol left in the blood was a trace, under 5 ng/mL, because conjugation happens within minutes. The concentrations that act on cells in a dish are hard to reach in living tissue from a capsule. Some conjugates may be active, and resveratrol may collect in the gut lining, so the question stays open. This gap is why a striking cell or animal result shrinks in a person.

What Changed

For a stretch of the 2000s resveratrol was the most discussed molecule in aging research, on the strength of the mouse work. In 2006 a study found that resveratrol improved the survival of middle-aged mice fed a high-calorie diet. It shifted their physiology toward that of mice on a standard diet. Press coverage compressed this into a longevity pill. Sirtris, a company built on sirtuin activators, was bought by GlaxoSmithKline for about $720 million in 2008, and the claim stuck.

The correction came from the same field. A 2008 study by many of the same researchers gave resveratrol to mice on a normal diet. It copied some gene-expression patterns of calorie restriction and improved several health markers, yet lifespan did not rise. The survival benefit came from offsetting the bad diet; a healthy mouse on a normal diet gained no extra lifespan. Human trials that followed were mostly small, ran for weeks to months, and disagreed on the main outcomes. No human trial has shown that resveratrol extends life. Then researchers measured resveratrol intake against lifespan directly. In 783 community-dwelling adults aged 65 and over, followed for nine years, they found no link to death, heart disease, cancer, or inflammation. Longevity is the claim that made resveratrol famous, and the human data do not support it.

Away from the aging claim, a smaller, steadier set of effects holds. Pooled human trials, in a meta-analysis of 11, point to metabolic effects in people with diabetes: better fasting glucose, insulin, HbA1c, and insulin resistance. In people whose glucose was already normal, little moved. Type 2 diabetes makes up 90–95% of diabetes cases and is largely diet-driven, much of it from ultra-processed food built around sugar, fat, and salt. Resveratrol, where it helps at all, is a minor lever downstream of that cause. A separate pooled analysis found that doses of 150 mg a day and above lowered systolic blood pressure, while the diastolic number did not move. These are modest, group-specific effects on small evidence bases, and they are the effects resveratrol has support for.

The longevity claim that made resveratrol famous is the one the human data do not support.

The Research & Studies

Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.

How it works

Resveratrol did not directly activate SIRT1 once the fluorescent assay tag was removedModerate · mixed

In plain terms

The idea that resveratrol switches on the sirtuin longevity enzymes was the heart of its reputation, but a later lab study could not reproduce that switch without a fluorescent tag on the test, so the direct-activation claim is now in doubt.

In detail

The sirtuin story began with Howitz et al. 2003 (Nature), which reported that resveratrol activates SIRT1 and extends replicative lifespan in Saccharomyces cerevisiae. Pacholec et al. 2010 (J Biol Chem) showed that resveratrol and several synthetic candidate activators did not activate SIRT1 against native peptide substrates, and that the apparent activation depended on a non-physiological fluorophore (7-amino-4-methylcoumarin) attached to the assay peptide. Resveratrol still affects cellular metabolism through debated routes, but the specific claim of direct SIRT1 activation is not settled.

The studies · 2

Pacholec et al. 2010, J Biol Chem (not direct activators of SIRT1) · J Biol Chem

Howitz et al. 2003, Nature (original sirtuin-activator report) · Nature

About 70% of an oral dose is absorbed but under 5 ng/mL stays in the blood as resveratrolModerate · mixed

In plain terms

Your body absorbs most of the resveratrol you swallow, but the gut and liver convert nearly all of it within minutes, so almost none of the active molecule reaches the blood. The levels that work on cells in a dish are hard to reach by taking a capsule.

In detail

Walle et al. 2004 (Drug Metab Dispos) gave six human volunteers 25 mg of 14C-labeled resveratrol orally and intravenously. Absorption was at least 70%, peak plasma resveratrol-plus-metabolites reached about 2 micromolar, but unchanged parent resveratrol was under 5 ng/mL. Rapid sulfate conjugation by intestine and liver was the rate-limiting step. The authors noted that conjugates or accumulation in the aerodigestive epithelium might still have effects, so low plasma parent levels do not by themselves rule out all activity.

The study · 1

Walle et al. 2004, Drug Metab Dispos (high absorption but very low bioavailability) · Drug Metab Dispos

Longevity And Mortality

Dietary resveratrol showed no link to death, heart disease or cancer in 783 older adults over nine yearsModerate · no effect

In plain terms

Among older adults tracked for nine years, how much resveratrol people got from their diet showed no link to how long they lived or to their rates of heart disease, cancer or inflammation.

In detail

Semba et al. 2014 (JAMA Intern Med), from the InCHIANTI cohort, measured urinary resveratrol metabolites in 783 adults aged 65 or older. Over nine years, 268 (34.3%) died, with no significant gradient across quartiles of resveratrol metabolites (P = .67) and no association with inflammatory markers, prevalent or incident cardiovascular disease, or cancer. The exposure reflects dietary (food and wine) resveratrol, which is far below supplement doses.

The study · 1

Semba et al. 2014, JAMA Intern Med (resveratrol levels and all-cause mortality, InCHIANTI) · JAMA Intern Med

Resveratrol improved survival in middle-aged mice on a high-calorie dietPreliminary

In plain terms

Mice fed a fattening diet lived better and longer when given resveratrol, and their bodies looked more like those of mice eating a normal diet. This is an animal result under a specific diet, not something shown in people.

In detail

Baur et al. 2006 (Nature) fed middle-aged mice a high-calorie diet with or without resveratrol. Resveratrol increased survival and insulin sensitivity, improved motor function, and produced organ and gene-expression changes overlapping those of caloric restriction. The benefit was demonstrated against the backdrop of a high-calorie diet, not in normally fed, healthy animals.

The study · 1

Baur et al. 2006, Nature (resveratrol improves survival of mice on a high-calorie diet) · Nature

Resveratrol did not extend lifespan in mice on a standard dietPreliminary · no effect

In plain terms

When mice ate a normal diet, not a fattening one, resveratrol improved some health markers but did not make them live any longer. The survival benefit seen earlier was tied to the bad diet, not to aging itself.

In detail

Pearson et al. 2008 (Cell Metab) reported that resveratrol induced transcriptional patterns in multiple tissues paralleling caloric restriction and every-other-day feeding, and improved several healthspan measures in standard-diet mice, but did not increase lifespan. Many of the same investigators were involved in the 2006 high-calorie-diet survival study, which makes the lifespan null in normally fed mice a direct qualification of that earlier result.

The study · 1

Pearson et al. 2008, Cell Metab (mimics dietary restriction without extending lifespan) · Cell Metab

Blood Sugar

Resveratrol improved blood-sugar control in people with diabetes across 11 trials, with no effect in those without itModerate

In plain terms

In people with diabetes, taking resveratrol modestly improved blood-sugar control and insulin resistance. In people whose blood sugar was already normal, it made no measurable difference.

In detail

Liu K et al. 2014 (Am J Clin Nutr) pooled 11 randomized controlled trials totaling 388 subjects. In participants with diabetes, resveratrol significantly lowered fasting glucose, insulin, HbA1c and HOMA-IR. In non-diabetic participants there was no significant effect, and subgroup and meta-regression analyzes in that group were unaffected by BMI, dose, duration or study quality. Trials were small and heterogeneous in dose and duration.

The study · 1

Liu K et al. 2014, Am J Clin Nutr (glucose control and insulin sensitivity meta-analysis) · Am J Clin Nutr

75 mg a day for 12 weeks changed no metabolic measure in nonobese postmenopausal womenModerate · no effect

In plain terms

In metabolically healthy postmenopausal women, three months of resveratrol raised its blood level but changed nothing measurable about their metabolism.

In detail

Yoshino et al. 2012 (Cell Metab) ran a randomized, double-blind, placebo-controlled trial of 75 mg/day resveratrol for 12 weeks in nonobese, postmenopausal women with normal glucose tolerance. Despite a rise in plasma resveratrol, there was no change in insulin sensitivity, body composition, resting metabolic rate, plasma lipids or inflammatory markers. This is the counterpart to the diabetic benefit: where there is no metabolic problem to correct, the trial found no change.

Who this may not transfer to:Tested only in nonobese postmenopausal women; the null result fits the wider pattern that resveratrol moves metabolic measures mainly in people who already have a metabolic problem, so a similar lack of effect in metabolically healthy men is plausible but untested.

The study · 1

Yoshino et al. 2012, Cell Metab (no metabolic improvement in nonobese women) · Cell Metab

Heart And Vascular

At 150 mg a day and up, systolic blood pressure fell about 11.9 mmHg, with no change in the lower numberEmerging

In plain terms

Resveratrol did not lower blood pressure on average, but at higher doses of 150 mg a day and up it reduced the upper number. The lower number did not move.

In detail

Liu Y et al. 2015 (Clin Nutr) pooled six randomized controlled trials totaling 247 subjects. The overall effect on systolic and diastolic pressure was not significant. A pre-specified subgroup taking 150 mg/day or more showed a significant systolic reduction of -11.90 mmHg, though the confidence interval was wide (-20.99 to -2.81), while meta-regression did not confirm a continuous dose effect. Diastolic pressure was unaffected.

The study · 1

Liu Y et al. 2015, Clin Nutr (blood pressure meta-analysis) · Clin Nutr

Ways to Do It

Match what you do to what the evidence supports. For longevity that is little; for metabolic markers in specific groups it is narrow but present.

1

Eat the foods it comes inFreeEasy

Grapes, blueberries, peanuts and dark chocolate carry small amounts of resveratrol as part of whole foods that already belong in a good diet. Get trace amounts from a varied diet and expect nothing dramatic from them.

2

A basic trans-resveratrol powder, for a specific metabolic target$Easy

If your aim is blood sugar and you have diabetes, plain trans-resveratrol is the studied form. Human trials ran from roughly 150 mg to 1000 mg a day, sometimes higher. Buy the trans form from a supplier carrying an independent testing mark. Make this decision with the doctor managing your diabetes, adding it to your existing treatment.

3

A higher dose aimed at blood pressure, with a clinician$ to $$Easy

For blood pressure, the studied doses start around 150 mg a day. If that is the goal, raise it with the prescriber following your readings, and weigh it against the blood-thinner interaction in the cautions.

4

A plain third-party-tested product$Easy

Resveratrol is a commodity. A third-party testing mark, NSF or Informed Choice, confirms the capsule holds what the label says. No advanced form has been shown to solve the bioavailability problem in people, so the testing mark is the thing to check.

5

Do the free basics with the strongest human evidenceFreeModerate

For the healthy aging the supplement is marketed on, the measures with solid human evidence are exercise, sleep, not smoking, and a diet built on whole foods. If the goal is to age well, do these first.

Go Deeper

• Taurine: made famous by its own 2023 aging study: like resveratrol, a strong animal result but thin human data.
• Omega-3 and fish oil: heart claims tested against hard clinical outcomes in large human trials.

The Chinese Medicine View

Resveratrol was first isolated and named in the 1900s, so it has no place in the classical Chinese pharmacopoeia. No historical text gives it a channel, a temperature, or a flavor. The tradition speaks instead about the foods it occurs in. Grapes read as sweet and sour and roughly neutral, tonifying to Qi and Blood and to the Liver and Kidney, a nourishing everyday fruit.

Wine reads very differently. It is warm and acrid, moving Qi and Blood, and it can free a stagnant, cold pattern in small amounts. Taken regularly it breeds internal heat and damp, burdening the Spleen and clouding the Liver, so the tradition would not prescribe wine for the heart. The same logic goes further: a warming, moving substance that helps one person can aggravate another, so the tradition would not give everyone the same dose. That individualized-dosing logic sits oddly next to a modern finding: resveratrol lowered blood sugar mainly in people whose sugar was already high. The two ideas rhyme, but the tradition was reasoning about heat and constitution, not blood glucose, so the modern result does not vindicate the old logic.

Cautions For This Practice

Extra restraint

Everything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.

Gram-level doses of 2.5 to 5 g a day caused nausea and loose stools in many people

Reviews of resveratrol safety (Shaito et al. 2020, Int J Mol Sci) summarize that low-to-moderate doses are generally well tolerated, while gram-level doses produce dose-related gastrointestinal symptoms. In Brown et al. 2010 (Cancer Res), 40 healthy volunteers took 0.5 to 5 g/day for 29 days; the higher doses produced gastrointestinal complaints and reduced circulating IGF-1 and IGFBP-3, an effect of uncertain clinical meaning.Shaito et al. 2020, Int J Mol Sci (potential adverse effects of resveratrol)Brown et al. 2010, Cancer Res (repeat-dose safety in healthy volunteers)

Resveratrol can add to blood thinners and slow the liver enzymes that clear many drugs

Safety reviews (Shaito et al. 2020, Int J Mol Sci) report that resveratrol inhibits several cytochrome P450 enzymes, including CYP3A4, CYP2C9, CYP2D6 and CYP1A2, that metabolize a large share of prescription drugs, and that it exerts antiplatelet effects. Most of this evidence is in vitro; clinical interaction studies in people are limited, so the practical concern is potential and not well-quantified, and it argues for a clinician or pharmacist reviewing the interaction.Shaito et al. 2020, Int J Mol Sci (adverse effects and drug interactions review)

Blood thinners, antiplatelet drugs and surgery

Resveratrol has antiplatelet activity, so it can add to the effect of a blood thinner such as warfarin, aspirin, or clopidogrel. At high doses it can also inhibit several liver enzymes that clear common drugs. That may raise the blood levels of medicines those enzymes process. If you take a blood thinner, or you have surgery coming up, tell your prescriber before adding resveratrol, and ask about pausing it beforehand.

Drugs cleared by the liver enzymes it affects

In laboratory work resveratrol inhibits cytochrome P450 enzymes such as CYP3A4 and CYP2C9. Between them these handle a large share of prescription drugs. Most of this evidence is from the test tube, with few measured interactions in people. Still, if you take regular medication, raise resveratrol with your pharmacist. A plant compound can still interfere.

High doses can upset the stomach

At 2.5 to 5 grams a day, the doses in some cancer-prevention studies, resveratrol caused mild to moderate nausea, loose stools, and abdominal discomfort. High doses also lowered a growth-factor hormone called IGF-1, an effect of uncertain meaning. These gram-level doses bring stomach effects without added benefit, and the studied metabolic doses are far lower.

Pregnancy, breastfeeding and hormone-sensitive conditions

Supplemental resveratrol has not been well studied in pregnancy or breastfeeding, so food-level intake is the sensible ceiling there. Resveratrol can also have weak estrogen-like activity in some tissues. Anyone with a hormone-sensitive condition should check with their doctor before taking a supplement dose, and keep to food-level amounts otherwise.

Anti-aging use

Using resveratrol to slow your own aging is experimental. There is no established anti-aging dose, and long-term supplement-level use has not been tested for safety.

Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.

Common Questions

Does resveratrol actually help you live longer?

The deciding study has not been done. No one has run a long randomized trial that doses people and follows how long they live. Until that trial reports, the answer rests on animal data alone.

Should I look for trans-resveratrol specifically?

Yes. Trans-resveratrol is the stable form used in nearly every human trial, so it is the one that matches the evidence. The cis form is less stable and barely studied.