Can high doses be harmful?
Vitamin doses within the scope of the statutory daily recommendations are absolutely safe. Studies substantiate that vitamins B1, B2, B12, C, E, folic acid, pantothenic acid and biotin are safe even up to a hundred times the daily requirements over a long period of time. Niacin and vitamin B6 are also tolerated in quantities up to fifty times the requirements without any side effects. However, a lot does not help a lot. As a rule, anything over two or three times the daily requirements cannot be utilized by the body.
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