A wide variety of antioxidants are found in foods and foodstuffs. Some of them such as vitamin C and vitamin E are recognized to play an essential role in the antioxidant defense on the oxidative damages in vivo. Carotenoids seems to be a member of dietary antioxidants acting in human body. Epidemiological studies have strongly suggested that consumption of carotenoid-rich foods are inversely related to the incidence of cancer and other degenerative diseases. An intervention study in China1 demonstrated that the supplementation of β-carotene, a typical carotenoid widespread in plant foods, is helpful in the prevention of cancer death. However, the role of dietary carotenoids in the antioxidant defense in vivo is still uncertain and therefore it is controversial whether or not antioxidant activity of carotenoids result in cancer-prevention.
KeywordsSinglet Oxygen Tomato Juice Liposomal Membrane Methylene Blue Solution Singlet Oxygen Quencher
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