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Review places vitamin benefits in doubt

16/04/2008

People who take vitamin supplements may not benefit their health and could increase the risk of premature death, according to a new report.

Danish researchers found that antioxidants do not prolong life expectancy as some may hope and that beta-carotene, vitamin A and vitamin E may actually increase the risk of death.

They did not uncover evidence that vitamin C and selenium have either positive or negative effects.

Their findings are based on a review of data from 67 randomised trials that involved just under a quarter of a million people and were released today by the Cochrane Library.

"We could find no evidence to support taking antioxidant supplements to reduce the risk of dying earlier in healthy people or patients with various diseases," said Goran Bjelakovic, who performed the systematic review at the Copenhagen Trial Unit at the Copenhagen University Hospital in Denmark.

"Regarding these antioxidants we need more data from randomised trials. The bottom line is that current evidence does not support the use of antioxidant supplements in the general healthy population or in patients with certain diseases."

Commenting on the review, the UK's Food Standards Agency said: "Most people should be able to get all the nutrients they need by eating a varied and balanced diet.

"If consumers do choose to take supplements, it is important they are informed and they may also wish to also consult with their GP. For some vitamins and minerals, taking too much or taking them for too long can cause harmful effects."