Resveratrol

Resveratrol, the famous polyphenol of red wine and grapes, is a potent antioxidant that activates the sirtuin longevity pathway (SIRT1) and dampens NF-κB-driven inflammation in skin cells. Studies document protection against UV-induced damage, reduced collagen-degrading enzymes (MMPs), and brightening of hyperpigmentation at 0.5–1%. Resveratrol is also mildly antimicrobial and supports barrier lipids. Its weakness — instability in light and air — is solved by encapsulated and derivative forms in quality products. Best used in night serums or stabilised morning antioxidants. For anti-aging enthusiasts, resveratrol plus niacinamide or vitamin C makes a genuinely complementary antioxidant stack.