Resveratrol
TL;DR
Polyphenol found in red wine and Japanese Knotweed
Moderate evidence for heart and metabolic health; low evidence for cognitive decline
Acts as a 'caloric restriction mimetic' by activating Sirtuin longevity genes
Very popular in the longevity community, though human trials are mixed
Generally safe; may interact with blood thinners
Cost: ~$15-30/month
Best for: General longevity support, heart health adjunct
What it is
Resveratrol is a plant defense chemical (phytoalexin). It gained fame through the 'French Paradox'—the observation that the French have low rates of heart disease despite a high-fat diet, theorized to be due to red wine.
Resveratrol's primary claim to fame is its ability to activate SIRT1, a gene associated with cellular repair and longevity. It effectively 'tricks' the body into a state of calorie restriction, which triggers protective cellular pathways. Most supplements use Trans-resveratrol from Japanese Knotweed, which is the most active form.
What the research says
The brain evidence is early. Brain Blood Flow. Studies show that a single dose of resveratrol can increase blood flow to the brain. Long-Term Memory. A study in Journal of Neuroscience found that resveratrol improved memory performance and hippocampal connectivity in older adults. However, it hasn't yet been proven to prevent or treat Alzheimer's.
Resveratrol is a 'friend of the arteries.' Blood Pressure. A meta-analysis showed that high-dose resveratrol (150mg+) significantly reduced systolic blood pressure. Vascular Health. It improves the 'flow-mediated dilation' of arteries, meaning they can expand more easily to handle blood flow. Verdict. A solid supporting supplement for overall cardiovascular aging.
Resveratrol shows promise for insulin resistance. Glucose Control. Research indicates it can improve insulin sensitivity and lower blood sugar in Type 2 diabetics by improving mitochondrial function. Note. Interestingly, it seems to work better in people with existing metabolic issues than in healthy, fit individuals.
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Safety
Generally safe. At very high doses (2g+), it may cause diarrhea or nausea. Like curcumin, it has mild anti-clotting effects.
Interactions
- Blood Thinners: May increase bleeding risk.
- CYP Substrates: May interfere with the metabolism of various drugs (e.g., Fexofenadine) by inhibiting certain liver enzymes.
Dosing
Standard Dose: 250-500 mg of Trans-resveratrol daily. Timing: Take with a fat-containing meal for best absorption. Form: Look for 'Trans-resveratrol' (not just Resveratrol) and ensure it's a 'micronized' or 'liposomal' form if possible.
Cost
Moderate. $15-30 per month.
The bottom line
Resveratrol is a high-potential longevity supplement. While it's not a 'miracle pill,' it is one of the best ways to activate the body's internal repair mechanisms.
Sources for this page include published meta-analyses, systematic reviews, and NIH dietary supplement fact sheets. All claims reflect the evidence as of early 2026.
This is not medical advice. Consult your healthcare provider before starting any supplement, especially if you take medications.