You can improve the look and feel of your skin by eating the right food. LEMONS AND LIMES: Highly alkalising, these citrus fruits promote more youthful skin by helping the body eliminate toxins. They also contain vitamin C, which boosts collagen formation in the skin. BLACK SESAME SEEDS: Rich in antioxidants, these seeds are also a source of protein, magnesium and zinc, essential for healthy skin. OILY FISH: The omega-3s in oily fish such as salmon, trout, sardines and tuna help calm skin inflammation, reduce skin sensitivity and enhance the immune system. RED GUAVA: Containing six times more vitamin C than organges, it is also a rich source of lycopene, which helps protect the skin from sun damage.