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    J Med Assoc Thai. 1992 Nov;75(11):619-24.

    Evaluating the UVA protection of commercially available sunscreens.

    Source

    Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.

    Abstract

    Because the protection factor of sunscreens concerns only UVB protection, usually only a little is known about the protection offered in the UVA range. Photoprotection against ultraviolet A (UVA) by five commercially available sunscreens and their components was evaluated in humans, with erythema and pigmentation used as end points. Because UVA-induced tanning obscures a UVA-erythema, quantitative analysis of UVA-erythema cannot be used as the end point in this study. All products provided low UVA protection factor (1.02-1.9). The sunscreen which contain 3 per cent Parsol 1789 was the most effective product and significantly better than the other (p < 0.0001).

    PMID:
    1307384
    [PubMed - indexed for MEDLINE]

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