In order to fix your peeling nails, you first need to address the reason why your fingernails are peeling. The most common causes for peeling nails include dehydration, environmental stress on your nails and hands (from chemicals in household cleaners or excessive hand washing, for example), and certain nutritional deficiencies. Once you figure out what is the likely cause, you are able to fix the peeling.
Dehydration is a common cause, and doctors recommend drinking a minimum of eight glasses of water a day to keep your body hydrated. Also, remember to treat your hands and nails with extra care if you suspect you're dehydrated; use a deeply hydrating hand lotion and a cuticle oil to keep your nails nourished. Chemicals in household cleaners and excessive hand washing are two more culprits for peeling nails, so always wear gloves when using harsh cleaners like bleach, and consider switching to an all-natural cleaner, which is more gentle on your hands. Brittle, peeling nails are common indicators of a diet lacking in certain vitamins and minerals. There are multivitamins formulated to address protein weakness in hair, nails and skin. Check the label to see if your vitamins provide biotin; if they don't, use a different brand. Also, consider taking calcium and vitamin D supplements to promote nail strength.