Abstract
Extrinsic photoprotection of human skin is determined by the efficacy of sunscreens to prevent ultraviolet (UV) B radiation-induced erythema and UVA radiation-induced pigmentation. In addition to externally applied sunscreens, oral supplementation of carotenoids has been clinically shown to protect human skin against ultraviolet B (UVB) radiation-induced erythema (sunburn). It is not known if this is also the case for UVA radiation-induced pigmentation. The main objective of this research was to clinically evaluate the photoprotective effects of daily supplementation with carotenoids against UVA radiation-induced pigmentation, in addition to UVB-induced erythema.
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