Resveratrol (3,5,4′-trihydroxystilbene) is a polyphenol produced by plants under stress, found in grape skin, Japanese knotweed (Polygonum cuspidatum), and red wine. It activates SIRT1, the sirtuins pathway central to longevity biology, and is a key component of David Sinclair’s personal supplement protocol alongside NMN. The science is real. The bioavailability problem is also real, and it shapes what you should actually buy.
Standard oral resveratrol has sub-1% bioavailability because it is rapidly conjugated to glucuronide and sulfate forms in the gut wall and liver before reaching systemic circulation. The pharmacologically active free resveratrol is what binds SIRT1. This means 500mg of standard resveratrol powder may deliver less free resveratrol to tissues than 150mg of a micronized or liposomal formulation.
Walle 2004 (Drug Metabolism and Disposition): oral resveratrol is almost completely absorbed but immediately conjugated, yielding very low free resveratrol plasma concentrations. Taking resveratrol with fat (yogurt, olive oil) meaningfully improves Cmax. Voduc 2014 found micronized resveratrol (Resvinol-25) achieved 3.6x higher plasma Cmax vs standard powder at same dose. Liposomal encapsulation produces similar or greater improvements in multiple PK studies. The practical implication: a 150mg micronized dose may be equivalent to 500mg of standard powder.
| Study | Dose / Duration | Population | Key Finding |
|---|---|---|---|
| Howitz et al. 2003 (Nature) | In vitro / animal | Yeast, C. elegans, Drosophila | Resveratrol activates SIRT1/Sir2; extends lifespan in model organisms — the foundational paper that launched the field |
| Timmers et al. 2011 (Cell Metabolism) | 150mg/day, 30 days | Obese men (n=11) | Improved mitochondrial function, reduced inflammation markers, improved metabolic rate — mimics caloric restriction at molecular level |
| Brasnyo et al. 2011 (Br J Nutr) | 10mg or 40mg/day, 4 weeks | Type 2 diabetic men (n=19) | Improved insulin sensitivity and reduced oxidative stress at both doses; 40mg superior |
| Gliemann et al. 2013 (J Physiology) | 250mg/day + exercise, 8 weeks | Older men (n=27) | Resveratrol attenuated exercise-induced cardiovascular adaptations — notable negative finding; may blunt exercise hormesis at high doses |
| Bo et al. 2016 (Nutrients) | 500mg/day, 6 months | Type 2 diabetes (n=192) | No significant glycemic improvement vs placebo in larger RCT; highlights inconsistency across trials |
The human evidence is genuinely mixed. Smaller mechanistic trials (Timmers, Brasnyo) show compelling metabolic effects. Larger pragmatic trials at higher doses (Bo 2016) often fail to replicate. The Gliemann 2013 finding that resveratrol may blunt exercise adaptation is a serious concern for athletic users. The most defensible position: resveratrol at 150–250mg/day from a micronized or liposomal source shows real metabolic effects in metabolically compromised individuals; evidence in metabolically healthy people is weaker.
Pterostilbene is a dimethylated analog of resveratrol with significantly higher oral bioavailability (~80% vs sub-1%) due to its additional methyl groups reducing glucuronidation. It activates SIRT1 similarly and has better tissue penetration. Some longevity practitioners use pterostilbene instead of or alongside resveratrol. The caveat: pterostilbene raises LDL cholesterol in some studies (Riche 2013), making it unsuitable for people with lipid concerns without monitoring. If cholesterol is not a concern, pterostilbene at 50–100mg/day offers better bioavailability than equivalent resveratrol doses.
| Brand / Form | Dose | Form | Verification | Notes |
|---|---|---|---|---|
| Toniiq Ultra High Purity Trans-Resveratrol | 500mg/cap | Micronized powder | HPLC; 98%+ trans-isomer purity | One of few brands with publicly quantified trans-isomer content; good value at this purity level |
| Renue By Science Liposomal Resveratrol | 200mg/serving | Liposomal | Third-party CoA; HPLC verified | Best bioavailability of any commercially tested option; dissolves in water; higher cost per mg but more free resveratrol delivered |
| ProHealth Longevity Trans-Resveratrol | 500mg/cap | Powder-in-capsule | Third-party CoA; pharmaceutical grade | Consistent quality; take with olive oil or yogurt to maximize absorption |
| Double Wood Trans-Resveratrol | 600mg/cap (Japanese knotweed extract) | Standardized extract | Third-party CoA; GMP USA | Japanese knotweed is the dominant commercial source; verify trans-isomer content separately from total polyphenol content |
| Elysium Basis | Resveratrol not included — NR + pterostilbene | Pterostilbene 50mg | Chromadex-sourced NR; third-party audit | Uses pterostilbene instead of resveratrol; legitimate alternative with better bioavailability but different risk profile |
Dose: 250–500mg/day trans-resveratrol from a verified micronized or liposomal source. Dose the bioavailability-enhanced forms lower (150–200mg liposomal = ~500mg standard). If athletic performance is a priority, note Gliemann 2013 and consider cycling off during heavy training blocks.
Timing: Take with a fat-containing meal (yogurt, olive oil, nuts). This is not optional — it meaningfully improves absorption. Sinclair takes resveratrol with yogurt specifically for this reason.
Stack: NMN 300–500mg + resveratrol 250–500mg taken together in the morning with food. NMN provides NAD+ substrate; resveratrol activates SIRT1 that consumes NAD+. Synergistic at the biochemical level; awaits formal head-to-head human RCT confirmation.
Monitoring: If using high-dose resveratrol (500mg+/day) long-term, annual lipid panel is prudent. Some users see changes in LDL at higher doses.
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