T. Colin Campbell, M.D. – Nutrition: a Minefield of Contradictions View larger

T. Colin Campbell, M.D. - Nutrition: a Minefield of Contradictions

T. Colin Campbell, M.D. – Nutrition: a Minefield of Contradictions

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Science often produces evidence that is contradictory. Beta carotene, an antioxidant vitamin A precursor that is found in green leafy vegetables, is said to prevent cancer. However, when it was tested in a very large study of smokers where oxidation/antioxidation is important, it actually increased cancer.