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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.