Multivitamins
are often taken as a kind of nutritional "insurance" to top up an inadequate diet. They're unlikely to do any harm - except to your wallet - but it's far from clear if they will do you any good.
Other supplements
Other nutrients, such as mineral supplements, vitamin C and B type vitamins, are widely consumed. However, there is disagreement about how beneficial they are and little evidence they alter health outcomes - despite what their manufacturers say.
Body overload
More is not necessarily better when it comes to vitamin and mineral supplements. Very big doses can be unsafe.
The Food Standards Agency in Britain released its largest safety review of vitamins and minerals in 2004. It suggests people who take excessive doses of some supplements are at risk of cancer, liver damage, loss of feeling in the arms and legs, and weakened bones.
Vitamin and mineral deficiencies aren't common in New Zealand. It is unlikely that a problem you have is caused by a deficiency. Check with a doctor.
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