Osteoporosis, calcium and estrogens
1984
Miller, Roger W.
Osteoporosis, or weakened bones, usually effects older people, particularly women, producing 1.3 million fractures a year. So prevalent is the problem, that a condition in which the spinal bones become so weak they collapse, causing a hunched back, has become known as "dowager's hump." A shortage of calcium is one reason for the loss; declining levels of estrogen is another. Smoking and alcohol also contribute to osteoporosis. The US Recommended Daily Allowance (RDA) for calcium is 1000 mg for adults. However, older women may need as much as 1,500 mg daily. Milk and dairy products, fish with bones, oranges, leafy green vegetables and broccoli are some excellent sources of calcium. Calcium supplementation should be undertaken with caution. Some products taken for the calcium content also contain lead. Vitamin D, which helps calcium absorption, should not be taken in excess of the 400 IU RDA as continued use of high doses has toxic effects. Use of estrogen drug has grown recently. Reportedly this hormone has been linked to endometrial cancer and is available only by prescription. (emc)
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