Red grapes are rich in polyphenols, among which resveratrol.
A polyphenol belonging to the stilbene class, resveratrol is capable of counteracting the reactive oxygen species (ros) which cause the skin ageing and degenerative processes.
Such antioxidant action is performed through a double action mechanism: on the one hand, it prevents ros formation – the reactive oxygen species – by chelating iron and copper ions that favour their formation. On the other hand, it blocks their action by acting as a scavenger, that means through a reaction that turns the radical into a stable species.
Moreover, resveratrol proved to have several effects:
- It extends cell lifespan by stimulating the production of sirtuins (sirt-1) – longevity proteins found in fibroblasts and keratinocytes.
- It performs a retinoid-like action: it is capable of stimulating collagen synthesis, inhibiting the enzymes involved in its degradation and giving tone to the skin.
- Depigmenting action (anti-spot).
- Anti-inflammatory action.