SupplementsAntioxidantsLongevityEvidence
Resveratrol became famous through the “French paradox” and animal longevity studies. In humans, the story is far less impressive — a useful lesson in how lab promise doesn’t always translate.
Key takeaways
- A polyphenol from grape skins, berries and peanuts, hyped for sirtuins and longevity based on animal data.
- Human trials are inconsistent and often null — the anti-ageing promise hasn’t materialised.1
- It has poor bioavailability (rapidly metabolised and cleared).
- Generally safe, but can interact with medications (it affects drug-metabolising enzymes).
What it is
Trans-resveratrol is a stilbene polyphenol produced by plants under stress. In cells and animals it activates sirtuin pathways linked to metabolic health — the basis for the longevity buzz.
The evidence
Comprehensive reviews of human trials conclude resveratrol is well tolerated but has poor bioavailability, and clinical results across metabolic and cardiovascular endpoints are mixed and largely underwhelming.1 The animal-to-human gap here is large.
Dose & how to use
Studies use a wide range (150–1000 mg/day); higher doses can cause GI upset. Given weak human evidence, expectations should be low.
Safety & who benefits
Safe for most, but check interactions if you take regular medication. Honestly, few people will notice much — it’s one of the more overhyped antioxidants.
References
Adult research summary for education, not a prescription. These are food supplements, not treatments for disease.
- Smoliga JM, et al. Resveratrol and health — a comprehensive review of human clinical trials. Mol Nutr Food Res 2011. pmc.ncbi.nlm.nih.gov
This article summarises nutrition science for education. It is not a substitute for individual medical advice; consult a professional before starting a supplement, in pregnancy, or alongside medication.