In-depth

Anorexia nervosa

Find out what's behind this life-threatening eating disorder and how to treat it.

Hyperparathyroidism

Hyperparathyroidism, or overactivity of one or more parathyroid glands, raises blood-calcium levels. The disorder can weaken bones and lead to other serious complications.

Hypoparathyroidism

Hypoparathyroidism is a disorder in which your parathyroid glands secrete abnormally low levels of parathyroid hormone, causing symptoms such as muscle aches.

Osteoporosis

Osteoporosis — developing fragile bones with age — threatens the independence of many older people, especially women. Learn how to avoid bone loss and fractures.

Oct. 06, 2011