What Is Resveratrol?
Resveratrol is a stilbene polyphenol produced by plants under stress—found in grape skins, red wine, Japanese knotweed (Polygonum cuspidatum), peanuts, blueberries, and dark chocolate. It gained prominence in the 1990s as part of the "French paradox" investigation, and research by David Sinclair's lab (Harvard) in the 2000s established it as a sirtuin activator—positioning it centrally in modern longevity science.
The biologically active form is trans-resveratrol. The cis form is largely inactive and forms when trans-resveratrol is exposed to light, heat, or acidic conditions. This is why supplement quality matters enormously—many cheap products contain degraded, low-potency resveratrol.
Mechanism: SIRT1 and Caloric Restriction Mimicry
Sirtuins are a family of NAD+-dependent deacetylases (SIRT1–7) that regulate gene expression in response to nutrient availability. SIRT1, the most studied, deacetylates histones and transcription factors including PGC-1α (mitochondrial biogenesis), p53 (apoptosis), NF-κB (inflammation), and FOXO (stress resistance).
Caloric restriction activates SIRT1 by raising the NAD+/NADH ratio (less fuel → less NADH → more free NAD+). Resveratrol activates SIRT1 allosterically—it binds a regulatory site on SIRT1, lowering its Km for NAD+ and substrate, effectively making SIRT1 more active at the same NAD+ concentration. This is why resveratrol + NMN (which raises NAD+) is synergistic: more SIRT1 activity (resveratrol) fuelled by more NAD+ (NMN).
Standard resveratrol has approximately 1% oral bioavailability—most is rapidly conjugated by gut enzymes and first-pass liver metabolism (sulphation and glucuronidation) before reaching the bloodstream. Taking with a fatty meal significantly improves absorption (lipid matrix slows gut transit). Micronised resveratrol (particle size <5 microns) or liposomal formulations can achieve 3–5× greater bioavailability. Pterostilbene—a methylated analogue found in blueberries—has ~80% bioavailability and longer half-life, but is roughly 3–4× more expensive.
Resveratrol vs Pterostilbene
| Parameter | Trans-Resveratrol | Pterostilbene |
|---|---|---|
| Bioavailability | ~1% (standard) / ~5% (micronised) | ~80% |
| Half-life | ~1–3 hours | ~7 hours |
| SIRT1 activation | Strong | Strong (similar mechanism) |
| Blood-brain barrier crossing | Limited | Better (more lipophilic) |
| LDL-lowering | Modest | More consistent evidence |
| Cost in India | ₹800–2,000/month | ₹2,000–5,000/month |
| Estrogenic activity concern | Mild phytoestrogen | Less than resveratrol |
The NMN + Resveratrol Stack
This is arguably the most discussed longevity supplement combination. The mechanistic rationale:
- NMN raises NAD+ — the essential cofactor for sirtuin deacetylase activity
- Resveratrol activates SIRT1 allosterically — lowers the NAD+ threshold needed for activation
- TMG provides methyl groups — consumed when NAD+ is recycled through methylation pathways
David Sinclair's reported protocol: 1g NMN + 1g trans-resveratrol taken with yogurt in the morning, plus 1g TMG. For most people beginning a longevity stack, lower starting doses (500 mg NMN + 250 mg resveratrol) are practical.
Human Clinical Evidence
- Cardiovascular: Multiple RCTs show resveratrol reduces blood pressure (systolic ~4 mmHg), LDL oxidation, and inflammation markers (CRP, IL-6) at 150–500 mg/day
- Insulin sensitivity: Mixed results; some studies show improvement in metabolic parameters, others neutral
- Cognitive: The ReVERB trial showed 200 mg/day improved cerebrovascular function and cognitive performance in older adults
- Anti-cancer (preclinical): Strong in vitro and animal data; human cancer prevention trials inconclusive
- Exercise performance: Concern that high doses (≥1g) may blunt exercise-induced adaptations—take on rest days or at lower doses during intense training phases
Frequently Asked Questions
Should I take resveratrol with NMN?
Yes—this is mechanistically synergistic. NMN raises NAD+ (the cofactor sirtuins need), and resveratrol activates SIRT1 allosterically. Taking both provides more SIRT1 activity fuelled by more NAD+. Always take resveratrol with a fatty meal (yogurt, olive oil, nuts) to maximise absorption. Add TMG (500–1000 mg) to support the methylation pathway. This stack is the most popular longevity combination used by researchers and biohackers globally.
Trans-resveratrol vs regular resveratrol – what's the difference?
Trans-resveratrol is the biologically active form. Cis-resveratrol (the other structural isomer) is largely inactive. Many cheap supplements contain partially degraded resveratrol with low trans content. Look for supplements specifying "≥98% trans-resveratrol" and stored in opaque containers (UV exposure converts trans to cis). Japanese knotweed extract and synthetic resveratrol are the most common high-quality sources; grape extract is generally lower purity.
What is the resveratrol dose for longevity in India?
150–500 mg/day of trans-resveratrol with a fatty meal is the standard longevity protocol. Higher doses (1g/day) are used by some researchers. Given resveratrol's ~1% bioavailability, micronised or liposomal forms are worth the premium. Start at 150 mg and assess tolerability before increasing. Take in the morning with NMN and a meal containing fat.
What are resveratrol's side effects and drug interactions?
Generally well-tolerated below 1g/day. Above 1g: GI upset, nausea, and diarrhoea are common. Resveratrol inhibits CYP3A4 and CYP2C9—enzymes that metabolise warfarin, statins, and many other drugs—potentially raising their plasma levels. Mild phytoestrogenic activity; caution with hormone-sensitive conditions. High doses may blunt exercise adaptation. Always inform your doctor if on prescription medications.