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.
When your nails begin to split, you may tend to believe that you should include more gelatin in your diet. But exposure to water is actually one of the top causes of split fingernails. Whenever you bathe, shower or swim, the water breaks down some of the cells that are responsible for holding your fingernails together.