Resveratrol

How it works: It extends the life of cells by increasing their internal energy source, mitochondria (the cells’ power producers). Resveratrol also helps repair DNA caused by sun exposure. Tip: You can also find it in the skin of grapes and red wine!

You need it if: You want to delay the signs of ageing. The ingredient is most effective when used early, as soon as the skin starts to thin.