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American Journal of Clinical Nutrition, Vol 47, 879-883, Copyright © 1988 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Ultraviolet light-induced reductions in plasma carotenoid levels

WS White, CI Kim, HJ Kalkwarf, P Bustos and DA Roe
Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853.

The effects of ultraviolet (UV) irradiation on plasma levels of carotenoids and vitamin A in human subjects were investigated in two crossover trials. UV exposures were given on 11 r 12 days of a 2-wk period. The 12 female and 12 male subjects received mean cumulative UV- A (320-400 nm) doses of 17.8 +/- 1.9 J/cm2 and 21.0 +/- 3.3 J/cm2 to the anterior and posterior sides of the body, respectively. UV-B (280- 320 nm) doses were equivalent to 10% of UV-A doses given. Significant reductions in plasma total carotenoid levels were observed in both female (p less than 0.004) and male (p less than 0.05) subjects after repeated irradiation. There was no significant effect on plasma vitamin A levels. It was concluded that UV treatment can reduce plasma carotenoid levels in vivo.


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