It's less than a century since scientists first identified the different vitamins and discovered their effects. In a short space of time, we've learnt how important vitamins are to our health and this has led to vitamin supplements becoming a multi-billion euro business worldwide.
But questions have been raised as to whether vitamin supplements deliver all the benefits they claim to have. And most recently, a warning signal was sounded about the effect of taking high doses of vitamins -- that they could pose a threat to our health.
Dr Steve Kerrigan, Lecturer in Pharmacology at the Royal College of Surgeons Ireland, says there is still a lot more to be learnt about vitamins.
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