Abstract
Nutrition plays an important role in the treatment of many diseases, and the right
choice of nutrients can help to prevent disorders and improve the quality of life.
Epidemiologic studies suggest that there is a close relationship between ultraviolet
exposure (high level of reactive oxygen species) and the intake of specific dietary
factors (eg antioxidants), and the diminished risk of developing cancer, coronary
heart disease, or cataracts. Free radicals and reactive oxygen species are synthesized
endogenously (eg, in energy metabolism and the antimicrobial defense system of the
body) or produced as reactions to exogenous exposure (eg, cigarette smoke, imbalanced
diet, exhaustive exercise, environmental pollutants, and food contaminants). Human
dietary intervention studies based on the use of antioxidant compounds show how they
can protect from endogenous and exogenous environmental assaults, and neutralize sun-induced
effects on the skin. The future challenge will be to combine the strategic use of
cosmeceuticals and nutraceuticals in preventing the damaging effects of ultraviolet
radiation and environmental pollutants on the many biologic processes involving skin
aging and cancer.
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