Chemical form absolutely critical · trans-isomer (active) vs cis-isomer (inactive). Only trans has SIRT1 activity. Pterostilbene optional but recommended by PK.
≥99% trans-isomer · e.g. ResVida®
Best for
Ideal use: dual 2× day dose protocol · tight budget.
Advantages
Absolute active form. 20% oral bioavailability (improvable with fat). Reasonable cost. ResVida® brand (DSM Nutritional) is benchmark.
Disadvantages
Short half-life (14 min) · needs multiple doses to sustain. Without pterostilbene, effect drops quickly.
Premium pterostilbene ≥99%
Best for
Ideal use: single daily dose · patients with frequent second-dose forgetfulness.
Advantages
4× oral bioavailability vs resveratrol. Half-life 105 min (7× longer). Single daily dose sufficient. Modulates AMPK plus SIRT1.
Disadvantages
More expensive. Less human RCT data (more bench/animal). Some sensitive patients report mild anxiety.
Trans-R + Pterostilbene in single capsule
Best for
Ideal use: 80% cases · serious longevity stack · Sinclair combo.
Advantages
Synergy: R provides human RCT data + Pt provides superior PK. Typical 250 mg R + 50 mg Pt ratio covers 24h with single dose. Best cost-efficacy ratio.
Disadvantages
Serious combo brands are few (Elysium Basis, Renue ByScience). Verify 99% purity both.
Ideal use: dual 2× day dose protocol · tight budget.
Ideal use: single daily dose · patients with frequent second-dose forgetfulness.
Ideal use: 80% cases · serious longevity stack · Sinclair combo.
Chemical form absolutely critical · trans-isomer (active) vs cis-isomer (inactive). Only trans has SIRT1 activity. Pterostilbene optional but recommended by PK.