1 Calcium and vitamin D intake. 2  A diet low in calcium and vitamin D makes you more prone to bone loss. 3  Medication use. 4  Some medicines increase the risk of osteoporosis. 5  Activity level. 6  Lack of exercise or long-term bed rest can cause weak bones. 7  Smoking.
Signs and Symptoms. 1  Nail splitting affects the fingernails and the toenails. The condition may appear as a single horizontal split between layers of the nail plate at the growing end or as multiple splits and loosening of the growing edge of the nail plate.
What causes nails to crack and split? Several of my fingernails have cracked or split ? why would this happen? I'm worried I have some kind of deficiency in my diet. I know they make a kind of nail polish that's supposed to keep your nails strong, but that seems like it doesn't really get to the root of the problem.