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Calcium products and supplements became hot tickets in supermarkets, health food stores, and drug stores in 1984, after a well-publicized National Institutes of Health conterence on the bone disease osteoporosis. High -powered marketing campaigns by the dairy industry and calcium supplement makers fueled the public's interest as other tentative research suggested that more calcium in the diet might protect against high blood pressure and colon cancer in some people. Sales of calcium supplements—powders, tablets, liquids, gels, gums, mints—increased sevenfold between 1980 and 1985. But the craze had its dark side, as excessive amounts of calcium upset the body's absorption of iron, zinc, and manganese, causing constipation and kidney stones. Some supplements contained lead and other toxic metals. Very often a change to a diet that supplied calcium from foodstuffs such as dairy products, tofu, sardines with bones, broccoli, and collard greens...
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This section contains 518 words (approx. 2 pages at 300 words per page) |
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