Word: selenium
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Dates: during 2000-2009
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...calcium intake. For vegans, however, consuming adequate amounts of calcium without the use of fortified foods or supplements is difficult without careful dietary planning. Among vegan youth who do not take supplements, there is reason for concern with respect to iron, calcium, vitamins D and B12, and perhaps also selenium and iodine...
...shell out up to $70 a pop for a hair analysis, but a report shows that the test--which is supposed to diagnose nutritional problems--is, at best, unreliable. Six popular labs were asked to test hair samples, all from the same head, for 30 minerals and metals, including selenium, aluminum and lead. Result? Reported concentrations for the same hair differed wildly from lab to lab, often varying 10-fold. If that's not enough to make your hair curl, most of the labs also sell supplements to remedy the ills they purportedly find...
...otherwise fine article "Vitamin Overdose" [PERSONAL TIME: YOUR HEALTH, April 24] was marred by a few errors. The Institute of Medicine Panel on Dietary Antioxidants, of which I was chairman, recommended a daily allowance of 55 micrograms for selenium, and an upper limit of 400 micrograms per day (not an upper limit of 55 micrograms per day). Exceeding the upper limit can lead to hair loss and brittle nails, not to the loss of fingernails. And finally, the upper level for dl-alpha-tocopherol, a synthetic form of vitamin...
...human blood can store and transfer to cells. For d-alpha-tocopherol, another form of the vitamin, the daily limit is 1,000 mg, or 1,500 IU. For dl-alpha-tocopherol, a synthetic form of vitamin E, the limit is 700 mg, or 1,100 IU. As for selenium, the upper limit is 55 micrograms...
...good sources of vitamin C, look to citrus fruits, potatoes, strawberries, broccoli and leafy green vegetables. Vitamin E is tucked away in nuts, seeds, liver, leafy green vegetables and vegetable oils. You can get selenium from fish, meat, grains and--yes!--garlic. So before you reach into your medicine cabinet for another pill, glance down at your plate first. It probably contains all the antioxidants you need...