Natural remedies for improving nail health. Vitamins and minerals play a crucial role in maintaining healthy nails. Deficiencies in certain vitamins and minerals can lead to brittle, dry, and discolored nails. Some of the key vitamins and minerals for nail health include biotin, iron, vitamin C, vitamin D, and vitamin B12. Taking a daily multivitamin or incorporating more foods rich in these nutrients into your diet can help improve the overall health of your nails.