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.
Brittle Nails - Causes and Treatment. Synopsis: Brittle nails are often a result of aging but may be due to diseases and conditions there are several methods to deal with brittle and split nails. Main Document. Onychoschizia or splitting of the nails is a very common problem often seen by dermatologists.