1 A diet low in calcium and vitamin D makes you more prone to bone loss. 2  Medication use. 3  Some medicines increase the risk of osteoporosis. 4  Activity level. 5  Lack of exercise or long-term bed rest can cause weak bones. 6  Smoking. 7  Cigarettes are bad for bones, and the heart, and lungs, too. 8  Drinking alcohol.
When Toes Turn Dark. Nails change colors for multiple reasons. The most common culprit for a black toenail is blood under the hard tissue. Damage to the end of the toe causes blood to leak through the nail bed and stain the keratin a dark color. This is also known as a subungual hematoma, or a bruise under the nail.
Nails are made from keratin, a protein thatâs also found in your hair. Nails have multiple tough layers that can peel. This can cause them to appear thin or become weakened, causing them to split. The medical term for peeling or splitting fingernails is onychoschizia. Peeling nails can be the result of outside or external trauma to the nail. More rarely, they can indicate a systemic condition, or a sign that a pathologic process is occurring inside your body. It takes six months for a fingernail to grow to its full length.