10 Things Your Hands Say About Your Health

Peeling and Flaky Skin
If the skin on your fingertips is suddenly flaky, you may have a vitamin B deficiency. B vitamins such as niacin (B3) and biotin (vitamin B7) are extra important for healthy skin, says Bank. "Taking a biotin supplement helps to promote healthy skin and nail growth; niacin helps protect and repair skin by preventing the formation of melanin, boosting collagen growth, and improving your skin's natural moisture barrier." In addition to taking a supplement, add niacin-rich foods such as fish, peanuts, and mushrooms, and biotin-rich foods such as avocados and tuna, to your diet.