FishSalmon, herring, mackerel, sardines, anchovies, and rainbow trout all contain omega–3 fats, which help fortify skin cell membranes, protect against sun damage, and may also reduce the risk of certain forms of skin cancer. These healthy fats allow water and nutrients into the skin while keeping toxins out, and may also fight inflammation in the skin. Just don’t cancel out the benefits of eating fish by preparing it in unhealthy ways. Avoid deep–fried fish, and go for baked, grilled, roasted or poached instead!