Lemons are stuffed with vitamins and minerals like vitamins B6 and C, iron, potassium and they also contain bioflavanoids which help prevent damage from free radicals which attack the skin and cause premature ageing. When it comes to your skin, lemons are incredibly brightening thanks to all that lovely Vit C and they also boost your metabolism and detoxifying the body, which means a clearer and more radiant complexion.