Above all, proper nutrition and an adequate supply of nutrients is important for our skin and nails. Calcium, zinc, vitamin C, magnesium, phosphorus and iron are very effective supplements. Basically, you should always take enough vital nutrients to keep your skin, hair, nails and metabolism healthy.Vitamins A, E, & C, Vitamin B complex, zinc, iron, silica and Phytoestrogens are also important for skin, hair and nails, but of course there are more substances that also contribute their parts.