You've probably heard resveratrol mentioned in the same breath as red wine, "anti-ageing," and vague promises about living longer. It sounds like wellness marketing. It isn't, entirely.

Resveratrol is a plant compound with a genuinely interesting research trail, including a small but notable trial in women with PCOS and a newer study on skin ageing. It's also one of the active ingredients in MyOva's Hair, Skin & Nails supplement, alongside myo-inositol, vitamin C, and hyaluronic acid. So let's skip the hype and look at what the actual research says: what resveratrol is, what it's been studied for, how much people use, and where the evidence is still thin.

Short version: resveratrol is a polyphenol antioxidant found in grape skins, red wine, and berries. Early research has looked at its role in hormone markers in PCOS, inflammation pathways, and skin ageing, with promising but limited results. It's not a fix for any condition, and it's not a replacement for medical care. It's a compound worth understanding if you're curious about what's actually in your supplement cabinet.

What is resveratrol, exactly?

Short answer: Resveratrol is a natural plant polyphenol found mainly in grape skins, red wine, blueberries, and peanuts, used by plants to fight off stress.

Resveratrol belongs to a group of plant compounds called stilbenes.^[3] Plants produce it as a defence mechanism, a kind of chemical armour against fungal infection, UV damage, and other environmental stress. Grapes make a lot of it, concentrated almost entirely in the skin, which is why red wine (fermented with the skins) contains far more than white wine.^[4] Blueberries, bilberries, cranberries, and peanuts contain smaller amounts.^[4]

Here's the part that surprises people: you'd have to drink an unreasonable amount of red wine to get a therapeutic dose of resveratrol from your glass alone. A five ounce glass typically contains somewhere between 0.2 and 3.6mg.^[4] The studies we'll talk about below used doses in the hundreds to low thousands of milligrams. That gap is exactly why resveratrol shows up as a concentrated supplement ingredient rather than a "just drink more wine" recommendation, and honestly, we'd never suggest the latter.

One more practical detail: resveratrol has notoriously low bioavailability. It's absorbed reasonably well when you swallow it, but your liver metabolises it fast, so most of what ends up circulating in your blood are metabolites rather than the original compound.^[3][4] This is part of why researchers keep experimenting with dose, timing, and delivery methods (including topical application, which we'll get to in the skin section).

Resveratrol had a moment of mainstream fame in the 1990s, tied to interest in the so-called "French Paradox," the observation that rates of heart disease in parts of France were lower than expected given a diet relatively high in saturated fat. Red wine consumption became a popular (if oversimplified) explanation, and resveratrol got swept up in the theory as a possible reason why.^[3] Decades of further research have complicated that early story considerably, but it's why resveratrol became a household name long before anyone was putting it in a skin and hormone supplement.

You'll also see it labelled as "trans-resveratrol" on ingredient panels, including on MyOva's own label. Resveratrol naturally exists in two structural forms, trans and cis, and trans-resveratrol is the more stable, more studied, and more biologically active form, which is why reputable formulations specify it rather than listing generic "resveratrol."^[3]

What does resveratrol actually do in the body?

Short answer: Researchers have been studying resveratrol as an antioxidant and a compound that may influence cell stress pathways, insulin markers, and inflammation signalling.

At a cellular level, resveratrol is classed as an antioxidant, meaning it can help neutralise free radicals, the unstable molecules that contribute to oxidative stress and cell damage over time.^[3] Antioxidant activity itself isn't a novel concept (vitamin C and E do this too), but resveratrol has attracted particular scientific attention because of a specific cell pathway it appears to interact with, one involved in cellular ageing and metabolic regulation.

Researchers have studied whether resveratrol might influence:

• Oxidative stress markers in the body
• Insulin and glucose handling, particularly in insulin-resistant conditions
• Inflammatory signalling pathways
• Blood vessel and cardiovascular function
• Skin cell turnover and collagen-related processes

Note the language here: "studied whether," not "proven to." Resveratrol does not currently hold an authorised health claim under UK or EU supplement regulations, which means no supplement brand, including us, is legally allowed to claim it treats or definitively resolves any medical condition. What we can tell you honestly is what the trials found, in the specific groups of people they studied, at the specific doses they used. That's the standard we're holding this entire article to.

Does resveratrol help with PCOS?

Short answer: One small trial found resveratrol lowered testosterone and fasting insulin in women with PCOS over three months, but larger studies are still needed.

If you've got PCOS, you already know the drill. You get a diagnosis, a leaflet about "diet and exercise," and not much else. You're not imagining it, the research on hormonal conditions genuinely lags behind conditions that affect men equally, and PCOS specifically has been chronically under-studied relative to how many women live with it.

So when a trial actually looks at PCOS specifically, it's worth reading closely, small sample size and all.

The most-cited resveratrol and PCOS study is a double-blind, randomised, placebo-controlled trial published in the Journal of Clinical Endocrinology & Metabolism.^[1] Researchers gave 34 women with PCOS either 1,500mg of micronised resveratrol daily or a placebo for three months. Thirty women completed the study. Here's what they found in the resveratrol group compared to placebo:

• Total testosterone dropped by 23.1%
• DHEAS (an adrenal androgen) dropped by 22.2%
• Fasting insulin fell by 31.8%
• Insulin sensitivity index improved by 66.3%
• Ovarian volume increased by 16.9%, while the placebo group's ovarian volume decreased by 11.5%, an unexpected and not fully explained result

Gonadotropin levels, lipid profile, and markers of inflammation and blood vessel function didn't change significantly between groups.^[1] Interestingly, the researchers also noted that leaner participants tended to see a bigger drop in testosterone than participants with a higher BMI.

What this does NOT mean: it doesn't mean resveratrol "fixes" PCOS, reverses it, or replaces any treatment plan you're on. It's one trial, with 30 completers, over three months, at a dose (1,500mg daily) that's considerably higher than what most over-the-counter supplements contain. A 2023 systematic review and meta-analysis of resveratrol RCTs in PCOS found the existing evidence promising but limited, and called for more, larger trials before firm conclusions can be drawn. What it does mean is that resveratrol is a legitimately interesting area of hormone research, not just a wellness trend with a nice marketing story attached.

Your diagnosis is a starting point, not a verdict, and understanding what the actual research says (rather than what an ad promises) is part of taking your own hormonal health seriously.

Is resveratrol good for skin?

Short answer: An 8-week trial in women over 40 found that combined oral and topical trans-resveratrol reduced wrinkle scores more than a placebo did.

Hormonal skin issues are their own special kind of unfair. Acne from PCOS, dullness and dehydration from perimenopause, breakouts timed suspiciously well with your luteal phase, your skin is often the most visible place your hormones show up, and skincare marketing rarely accounts for any of it.

Resveratrol's skin research is newer and smaller than its PCOS research, but a 2025 randomised, placebo-controlled trial in Frontiers in Aging is worth knowing about.^[2] Researchers enrolled 134 healthy women aged 40 and older, and 122 completed the 8-week study. Participants were split into four groups testing combinations of an oral trans-resveratrol capsule (75mg twice daily) and a topical cream containing 1.5% trans-resveratrol (applied twice daily), against matching placebos.

The group using both the active oral capsule and the active topical cream together showed the most improvement: an 11.9% reduction in wrinkle score by week 8, compared to a 6.3% reduction in the placebo-only group.^[2] The active topical groups also showed a notable increase in sebum production in the U-zone (cheeks, jaw, and chin), which researchers linked to improved skin barrier function. Elasticity, hydration, pore size, and overall "skin age" scores didn't show significant differences between groups, which is a useful reality check, this is early-stage research on specific, measurable outcomes, not a full skin overhaul.

Separately, resveratrol has been researched more broadly in dermatology as an antioxidant that may help protect skin cells from the kind of oxidative and UV-related stress that contributes to visible ageing over time, and its anti-inflammatory properties have been explored in inflammatory skin conditions.^[3] Again, "explored" is the operative word. Resveratrol has no authorised skin health claim in the UK or EU, so we're not going to tell you it will clear your skin. What we can tell you is that the ingredient has a genuinely active research programme behind it, which is more than most trending skincare ingredients can say.

Your body is trying to tell you something when your skin flares up around your cycle or during a hormonal transition, and antioxidant support alongside a proper skincare routine and, where needed, medical treatment, is a reasonable piece of the puzzle. It's not a magic fix. But it gives your body what it's often missing.

Can resveratrol help with inflammation?

Short answer: Resveratrol is studied as an antioxidant that may interact with inflammatory pathways, though results across trials have been mixed and it holds no authorised anti-inflammatory claim.

Chronic low-grade inflammation comes up constantly in hormonal health conversations, PCOS, endometriosis, perimenopause, it's often mentioned as an underlying thread. That's part of why resveratrol gets discussed alongside these conditions in the first place: as a polyphenol antioxidant, it's a natural fit for inflammation research.

But it's worth being precise here, because this is exactly where supplement marketing tends to get sloppy. In the PCOS trial we covered above, researchers specifically measured markers of inflammation and found no significant change between the resveratrol and placebo groups.^[1] Other lab and animal studies have shown resveratrol interacting with inflammatory signalling pathways, but human trial results across different conditions have been inconsistent, some show a measurable effect, others don't.^[3]

So the honest summary is this: resveratrol is a compound with plausible, mechanistic reasons to be studied for inflammation, and it's an active area of research. It is not a proven anti-inflammatory in the way, say, ibuprofen is. If inflammation is a concern for you, particularly if you're managing endometriosis or another inflammatory condition, that's a conversation for your GP or specialist, not a supplement bottle.

This matters more in hormonal health circles than most areas of wellness, because "inflammation" gets used as a catch-all word that can end up meaning almost nothing. Endometriosis involves a specific, diagnosable inflammatory process. General hormonal fluctuation-related puffiness or fatigue is a different thing entirely, and neither is something a single polyphenol supplement is going to meaningfully resolve on its own. Antioxidant-rich nutrients, including resveratrol, vitamin C, and grape seed extract, are reasonably studied as part of a broader nutritional picture. They are not a replacement for diagnosis, medication, or specialist care, and any brand implying otherwise isn't being straight with you.

How much resveratrol should you take?

Short answer: Clinical trials have used doses from 10mg to 2,000mg daily, with most metabolic and cardiovascular studies in the 100 to 400mg range.

There's no single, universally agreed "correct" dose of resveratrol, which is genuinely frustrating if you're hoping for a simple number. What we can tell you is the range that's actually been studied. Clinical trials have used resveratrol doses anywhere from 10mg up to 2,000mg per day, with cardiovascular and metabolic research commonly landing in the 100 to 400mg range.^[4] The PCOS trial referenced earlier used 1,500mg daily, at the higher end of what's been studied, and the skin trial used 150mg daily (75mg twice a day) alongside a topical product.^[1][2]

Doses above roughly 1,000mg per day have been associated with mild to moderate gastrointestinal side effects in some people, including nausea, abdominal discomfort, flatulence, and diarrhoea.^[4] This is one of several reasons most everyday supplements sit at more modest, food-adjacent doses rather than the higher amounts used in isolated clinical trials.

MyOva's Hair, Skin & Nails supplement contains trans-resveratrol alongside a broader formula, including 2000mg of myo-inositol, vitamin C, hyaluronic acid, grape seed extract, alfalfa powder, zinc, selenium, biotin, vitamin B6, and a probiotic strain (Lactobacillus acidophilus). The suggested use is two capsules in the morning and two in the evening, four capsules across the day. Myo-inositol, like resveratrol, currently has no authorised UK or EU health claim, so we're not going to tell you it "fixes" insulin resistance or ovulation, that's not an honest claim to make about any supplement. What we can say is that vitamin C contributes to normal collagen formation and to the reduction of tiredness and fatigue, and vitamin B6 contributes to the regulation of hormonal activity, both are authorised claims backed by established nutrition science.^[3]

Hormonal literacy isn't complicated, it's just rarely taught, and knowing the difference between "this ingredient has research behind it" and "this ingredient is guaranteed to work" is a core part of that literacy.

Are there any risks or interactions?

Short answer: Resveratrol supplements may interact with blood-thinning medication and haven't been established as safe in pregnancy or breastfeeding, so check with a doctor first.

This is the section not to skip. Resveratrol is generally well tolerated in the doses used in most supplements, but there are a few things worth knowing before you add it to your routine.

Blood thinners and anticoagulants. Resveratrol may have a mild effect on blood clotting, and at higher doses this could theoretically increase bleeding risk when combined with anticoagulant or antiplatelet medication such as warfarin, aspirin, or clopidogrel.^[4] If you take any blood-thinning medication, or you have an upcoming surgery or procedure, tell your doctor or pharmacist that you're taking a resveratrol-containing supplement before you start.

Pregnancy and breastfeeding. The safety of resveratrol supplements during pregnancy and while breastfeeding hasn't been established, and current guidance is to avoid supplemental resveratrol during this time.^[4] If you're pregnant, trying to conceive, or breastfeeding, speak with your GP or midwife before taking any new supplement, resveratrol included.

Higher doses. As mentioned above, doses over roughly 1,000mg daily have been linked to gastrointestinal side effects in some people.^[4] There isn't strong long-term human safety data at the higher end of the studied range, so more isn't automatically better. One frequently cited safety overview notes resveratrol has generally low toxicity, though it still recommends sourcing most of your intake through a varied diet and treating high-dose supplementation with the same caution you'd apply to any concentrated plant extract.^[5]

Medication interactions generally. Because resveratrol is metabolised by the liver, it may interact with certain medications processed the same way. If you're managing a diagnosed condition or taking regular prescription medication, running any new supplement past your GP or pharmacist first is always the sensible move, not an overcautious one.

Frequently Asked Questions

Is resveratrol the same as red wine extract?
Not quite. Resveratrol is one specific polyphenol found in grape skins, and it's present in red wine because wine is fermented with the skins on. Red wine also contains other polyphenols, alcohol, and compounds resveratrol supplements don't contain. A supplement gives you a measured, concentrated dose of trans-resveratrol without the alcohol.

Does resveratrol help with PCOS-related weight?
The PCOS trial covered in this article didn't specifically measure weight as an outcome, it focused on testosterone, DHEAS, insulin, and ovarian volume.^[1] There's no reliable evidence that resveratrol alone causes weight loss, and any supplement claiming otherwise is overstating the research.

Can I get enough resveratrol from food alone?
Grape skins, red grapes, blueberries, and peanuts all contain resveratrol, but in small amounts. You'd need an impractical quantity of red wine or grape juice to reach the doses used in clinical trials, which is why concentrated supplements exist for people who want to explore this ingredient specifically.^[4]

How long does resveratrol take to show any effect?
In the PCOS trial, changes in testosterone, insulin, and ovarian volume were measured after three months of daily use.^[1] In the skin trial, wrinkle score changes were measured at 8 weeks.^[2] Consistency over weeks to months, not days, is what the existing research reflects.

Is resveratrol safe to take every day long-term?
It's generally well tolerated at typical supplement doses, but robust long-term human safety data, especially at higher doses, is still limited.^[3][4] If you're taking it long-term, it's worth mentioning to your GP, particularly if you're on any regular medication.

Can resveratrol interact with hormonal contraception or HRT?
There isn't strong published evidence of a direct interaction, but because resveratrol is processed by the liver, it's sensible to mention any supplement you're taking to your GP or prescriber when you're on hormonal contraception or HRT, so they have the full picture.

Why is resveratrol paired with myo-inositol in MyOva's Hair, Skin & Nails formula?
Both are compounds actively studied in relation to PCOS and hormonal health, alongside vitamin C, hyaluronic acid, and other ingredients aimed at skin and hair support. Neither ingredient currently holds an authorised UK or EU health claim, so we describe the formula honestly, as ingredients with research interest, not as a guaranteed fix.

Does resveratrol expire or lose potency in supplements?
Like most polyphenols, resveratrol can degrade with prolonged exposure to light, heat, and air. Store supplements in a cool, dry place, and check the expiry date on the packaging.

References

1. Banaszewska B, Wrotyńska-Barczyńska J, Spaczynski RZ, Pawelczyk L, Duleba AJ. Effects of Resveratrol on Polycystic Ovary Syndrome: A Double-blind, Randomized, Placebo-controlled Trial. Journal of Clinical Endocrinology & Metabolism. 2016;101(11):4322-4328. Available at: academic.oup.com/jcem/article/101/11/4322/2765013
2. Trans-resveratrol reduces visible signs of skin ageing in healthy adult females over 40: an 8-week randomized placebo-controlled trial. Frontiers in Aging. 2025. Available at: frontiersin.org/journals/aging/articles/10.3389/fragi.2025.1727244/full
3. Linus Pauling Institute, Oregon State University. Resveratrol. Micronutrient Information Center. Available at: lpi.oregonstate.edu/mic/dietary-factors/phytochemicals/resveratrol
4. Resveratrol: Benefits, Side Effects & Dosage. Drugs.com. Available at: drugs.com/resveratrol.html
5. Health Benefits of Resveratrol, and Should You Take It? Cleveland Clinic. Available at: health.clevelandclinic.org/resveratrol-benefits

Further Reading

• What is PCOS? A complete guide
• PCOS skincare tips: managing hormonal breakouts
• Hair, Skin & Nails supplement

This article is for general information only and does not replace advice from your GP or a qualified healthcare professional. Food supplements should not be used as a substitute for a varied and balanced diet. If you're pregnant, breastfeeding, taking medication or managing a diagnosed health condition, check with a healthcare professional before starting a new supplement.

References