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Resveratrol
Resveratrol is a polyphenol antioxidant found in red grapes, berries, and peanuts. It activates sirtuin longevity genes, improves cerebral blood flow, and protects the brain from oxidative stress and inflammation - making it one of the most studied compounds for healthy brain ageing.
Benefits
What is Resveratrol?
Resveratrol (3,5,4'-trihydroxystilbene) is a natural polyphenolic compound produced by certain plants in response to stress, injury, or fungal infection. It gained widespread attention following the observation of the "French Paradox" - the relatively low incidence of heart disease among the French population despite a diet high in saturated fat, attributed partly to their regular consumption of red wine.
As a nootropic, Resveratrol is primarily valued for its neuroprotective and anti-ageing properties. It is one of the most potent natural activators of sirtuins - a family of proteins often called "longevity genes" - which regulate cellular stress responses, DNA repair, inflammation, and mitochondrial function. By activating SIRT1 in particular, Resveratrol may help the brain resist age-related decline.
Research has also demonstrated that Resveratrol significantly increases cerebral blood flow in a dose-dependent manner, improving the delivery of oxygen and nutrients to the brain. This vasodilatory effect, combined with its potent antioxidant and anti-inflammatory properties, positions Resveratrol as a comprehensive neuroprotective compound.
- Sirtuin activation: Resveratrol activates SIRT1 and other sirtuin enzymes, promoting DNA repair, reducing inflammation, improving mitochondrial function, and supporting cellular longevity pathways.
- Cerebral blood flow: Increases nitric oxide (NO) production and promotes vasodilation, significantly improving blood flow to the brain in a dose-dependent manner, enhancing oxygen and nutrient delivery.
- Antioxidant and anti-inflammatory: Potent scavenger of reactive oxygen species (ROS) and inhibitor of NF-kB, a master regulator of inflammatory gene expression, protecting neurons from oxidative and inflammatory damage.
- AMPK activation: Activates AMP-activated protein kinase (AMPK), a cellular energy sensor that promotes mitochondrial biogenesis and metabolic efficiency in brain cells.
- Beta-amyloid clearance: Research suggests Resveratrol may promote the clearance of beta-amyloid plaques and reduce tau hyperphosphorylation, two hallmarks of Alzheimer's pathology.
- Typical dose: 150–500 mg per day
- For neuroprotection: 250–500 mg of trans-resveratrol daily
- For cerebral blood flow: Studies showing benefits used 250–500 mg doses
- Trans- vs cis-resveratrol: Ensure your supplement contains trans-resveratrol, the biologically active form; cis-resveratrol has minimal activity
- Bioavailability: Resveratrol has poor oral bioavailability (~1%). Look for micronised or lipid-encapsulated formulations, or take with a fat source to improve absorption
- With piperine: Black pepper extract (piperine) can increase resveratrol absorption by up to 229%
Resveratrol benefits are generally long-term and cumulative. Take consistently for at least 4–8 weeks to evaluate effects.
- Side effects: Generally well-tolerated. GI discomfort (nausea, diarrhoea, cramping) possible at high doses (>1 g/day). May cause headache in some individuals.
- Drug interactions: May interact with blood thinners (warfarin, aspirin) due to antiplatelet effects. May affect CYP450 enzyme activity, potentially altering metabolism of various medications.
- Oestrogenic activity: Resveratrol has weak oestrogenic properties - use with caution in hormone-sensitive conditions (breast cancer, endometriosis).
- Pregnancy: Not recommended during pregnancy or breastfeeding due to insufficient safety data and oestrogenic effects.
- Iron absorption: High doses may chelate iron; individuals with iron deficiency should be cautious.
Natural Sources & Forms
- Red grapes and red wine: The most well-known dietary source (1–2 mg per glass of red wine)
- Japanese knotweed: (Polygonum cuspidatum) - the primary commercial source for supplements, containing high concentrations of trans-resveratrol
- Berries: Blueberries, cranberries, bilberries, and mulberries contain modest amounts
- Peanuts: Contain small amounts of resveratrol, particularly when boiled
- Supplements: Available as capsules and tablets, typically derived from Japanese knotweed or grape skin extract. Look for trans-resveratrol content specifically.
Research Studies
A randomized, double-blind, placebo-controlled trial of resveratrol for Alzheimer disease
Turner RS, Thomas RG, Craft S, van Dyck CH, Mintzer J, Reynolds BA, Brewer JB, Rissman RA, Raman R, Aisen PS - Neurology
Resveratrol (up to 2g daily) stabilized brain volume loss and reduced neuroinflammation biomarkers in Alzheimer's patients.
Effects of resveratrol on memory performance, hippocampal functional connectivity, and glucose metabolism in healthy older adults
Witte AV, Kerti L, Margulies DS, Flöel A - Journal of Neuroscience
Resveratrol (200mg daily) improved memory retention and hippocampal function in healthy older adults over 26 weeks.
Frequently Asked Questions
Resveratrol is a polyphenol antioxidant found in red grapes, berries, and peanuts. It activates sirtuin longevity genes, improves cerebral blood flow, and protects the brain from oxidative stress and inflammation - making it one of the most studied compounds for healthy brain ageing.
The key benefits of Resveratrol include: Cognitive Enhancement, Energy, Focus, Longevity, Memory, Mood.
Sirtuin activation: Resveratrol activates SIRT1 and other sirtuin enzymes, promoting DNA repair, reducing inflammation, improving mitochondrial function, and supporting cellular longevity pathways. Cerebral blood flow: Increases nitric oxide (NO) production and promotes vasodilation, significantly improving blood flow to the brain in a dose-dependent manner, enhancing oxygen and nutrient delivery. Antioxidant and anti-inflammatory: Potent scavenger of reactive oxygen species (ROS) and inhibitor of NF-kB, a master regulator of inflammatory gene expression, protecting neurons from oxidative and inflammatory damage. AMPK activation: Activates AMP-activated protein kinase (AMPK), a cellular energy sensor that promotes mitochondrial biogenesis and metabolic efficiency in brain cells. Beta-amyloid clearance: Research suggests Resveratrol may promote the clearance of beta-amyloid plaques and reduce tau hyperphosphorylation, two hallmarks of Alzheimer's pathology.
Typical dose: 150–500 mg per day For neuroprotection: 250–500 mg of trans-resveratrol daily For cerebral blood flow: Studies showing benefits used 250–500 mg doses Trans- vs cis-resveratrol: Ensure your supplement contains trans-resveratrol, the biologically active form; cis-resveratrol has minimal activity Bioavailability: Resveratrol has poor oral bioavailability (~1%). Look for micronised or lipid-encapsulated formulations, or take with a fat source to improve absorption With piperine: Black pepper extract (piperine) can increase resveratrol absorption by up to 229% Resveratrol benefits are generally long-term and cumulative. Take consistently for at least 4–8 weeks to evaluate effects.
Side effects: Generally well-tolerated. GI discomfort (nausea, diarrhoea, cramping) possible at high doses (>1 g/day). May cause headache in some individuals. Drug interactions: May interact with blood thinners (warfarin, aspirin) due to antiplatelet effects. May affect CYP450 enzyme activity, potentially altering metabolism of various medications. Oestrogenic activity: Resveratrol has weak oestrogenic properties - use with caution in hormone-sensitive conditions (breast cancer, endometriosis). Pregnancy: Not recommended during pregnancy or breastfeeding due to insufficient safety data and oestrogenic effects. Iron absorption: High doses may chelate iron; individuals with iron deficiency should be cautious.
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