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tt010101
ANSWERS: 2
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Try Google, I'm sure you'll learn everything you need to know about Zinc, and any other vitamin or mineral.
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The average daily intake of Zn is about 10 mg, present in protein rich foods, around 30% of the ingested zinc is actually absorbed. Zinc reserves are quite small, mostly in muscle and bone, and excess zinc can be bexcreted in urine, bile, and breastmilk. As such, zinc deficieny can occur through dietary insufficiency. However, you want to know about too *much*. OK, zinc toxicity is very rare, especially since there are a number of methods of excreting the small proportion that is absorbed, and it is very difficult to consume too much by eating. Hence there is little information available. However, in rare circumstances it can occur, usually following exposure to excessive zinc fumes in industrial accidents. Also, self poisoning with zinc salts can occur, and it produces fever, vomiting, stomach cramps and diarrhoea. It also supresses copper and iron absorption, that can produce anaemia.
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