Word: vitaminous
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...labels on most vitamin-B bottles accurately reflect how much B is in the pills, according to a consumer group, but in more than half the brands tested, the amount of vitamin B exceeded what experts consider safe. The worst offender: niacin, sometimes sold in doses 10 times the upper limit. Too much niacin--more than 35 mg daily--can cause skin flushing and even liver damage...
...VITAMIN OVERDOSE Healthy skin, shiny hair...and hip fractures? They're all associated with retinol, a vitamin-A compound found in liver, fish oils and other supplements. Retinol is usually linked to good skin and improved eyesight, but researchers say too much of the stuff can also increase the risk of hip fractures. An 18-year evaluation of more than 72,000 postmenopausal women found that those ingesting about 2,000 mcg or more a day were nearly twice as likely to injure their hips in a fall...
...news on vitamin E has been more mixed. Healthy folks who take 400 IU daily (standard multivitamins usually contain 30 IU) for at least two years appear somewhat less likely to develop heart disease. But when doctors give vitamin E to patients who already have heart disease, the vitamin doesn't seem to help. It may turn out that vitamin E plays a role in prevention but cannot undo serious damage...
...Despite vitamin C's great popularity and near ubiquity, consuming large amounts of it still has not been positively linked to any great benefit. The body quickly becomes saturated with C and simply excretes any excess...
...latter, there's no need to go to extremes and buy the biggest horse pills or the most expensive bottles. Megadoses can cause trouble, including excessive bleeding and neurological problems. One important caveat: it's easy to get too much retinol (preformed vitamin A) from supplements and diet, which may increase the risk of hip fractures and birth defects. So make sure that retinol is not the only source of vitamin A in your pills...