Worries that taking extra folic acid might increase the risk of cancer have been played down by a major study. Following Canadian research linking the vitamin with a small rise in cancer, the study in the Lancet journal looked at data from 50,000 people. It found no significant differences in those taking folic acid. Taken in early pregnancy, it reduces the chances of certain birth defects and there have been calls to add it to food in the UK. Many countries, including the US and Canada, South Africa and Australia,...
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