This symposium focused on the research which documents benefit and toxicity in beta-carotene supplementation. Reflecting on past and current studies, the panel of experts discussed: (1) the potential harm of a high intake of beta-carotene on selected populations, (2) biochemical antioxidant/prooxidant mechanisms of beta-carotene at the cellular level, (3) potential benefits of other carotenoids and antioxidants, and (4) future directions for research in beta-carotene and other antioxidants.
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S.T. Omaye (1997) studied this question.