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自由基(又叫“氧游离基”)是机体细胞新陈代谢的副产物,它会损伤脱氧核糖核酸,侵蚀细胞膜及杀死细胞。过多自由基微小分子堆积在体内,被认为是导致衰老及癌症、心脏病、白内障等病变的元凶。近年来医学界强调多摄入能消除自由基的抗氧化物的观点十分流行,像维生素E,C以及β胡萝卜素等制剂以及相关的保健品,至今在市场上仍很畅销。 然而,最近有科学家告诫,补充抗氧化物并非越多越好,长期服用还会造成不良后果。 有科学家认为,人体本身具有较强的自然平衡自由基的机制,即体内自由基较
Free radicals (also called “oxygen free radicals”) are by-products of the body’s cellular metabolism that damage DNA, erode cell membranes and kill cells. Too many free radical micro-molecules accumulate in the body, is considered to lead to aging and cancer, heart disease, cataracts and other culprit. In recent years, the medical profession has emphasized that it is very popular to consume more antioxidants that can eliminate free radicals. Preparations such as vitamin E, C and beta-carotene, and related health products, are still very popular in the market. However, some scientists have warned recently that supplementation with anti-oxidants is not as good as possible, and long-term use may have undesirable consequences. Some scientists believe that the body itself has a strong natural balance of free radicals mechanism, that is, the body of free radicals than