ResveratrolNew

Reviewed Sep 22, 2026

Resveratrol is a polyphenol found in grape skins and red wine that activates the SIRT1 and AMPK pathways, mimicking aspects of caloric-restriction signaling — the basis for its long-standing interest as a longevity compound. Its human evidence base is now large but genuinely mixed. A 2026 umbrella review in Nutrition Journal that pooled 45 systematic reviews (129 associations across 68 outcomes) found high-certainty evidence that resveratrol lowers blood pressure in people with type 2 diabetes — systolic by about 7.97 mmHg (95% CI 5.31–10.63) and diastolic by about 3.55 mmHg (95% CI 1.93–5.18) — reduces total cholesterol in overweight adults by about 0.19 mmol/L (95% CI 0.06–0.32), and modestly reduces waist circumference by about 0.80 cm (95% CI 0.20–1.40). Moderate-certainty evidence pointed to small improvements in fasting glucose and insulin in general populations, reductions in C-reactive protein and TNF-α in cardiovascular patients, and a small gain in working memory (SMD 0.20). Importantly, only about 27% of the pooled associations reached statistical significance, effects were often absent in the very populations where they were expected (for example, no glucose benefit in established type 2 diabetes or NAFLD), and benefits tended to be greater at lower doses (under 500 mg/day) — consistent with resveratrol’s dose-dependent, biphasic redox behavior (antioxidant at low doses, potentially pro-oxidant at high doses) and its well-documented poor oral bioavailability. A 2025 meta-analysis in postmenopausal women found reductions in pain and a bone-resorption marker but no significant effect on cognition, mood, or metabolic outcomes, and a 2026 systematic review of clinical trials and patents (2000–2025) concluded that bioavailability remains the central barrier to reliable clinical effects. Typical trans-resveratrol study doses range from about 150 to 1,000 mg/day taken with food; it is generally well tolerated but can cause GI upset and may interact with anticoagulants and drugs metabolized by CYP enzymes, and it is best used cautiously in estrogen-sensitive conditions. This information is educational and is not medical advice or a claim to diagnose, treat, cure or prevent any disease — discuss supplementation with your physician, especially if you take other medications.