Abstract
Abstract Active ingredients of sunscreens, or UV filters, have increased in use because public awareness of sun safety has risen. In addition to this intentional use, unintentional exposures to UV filters also occur through application of personal care products, where the filters are incorporated into the product. There are 2 main types of UV filters: organic (chemical) filters and the 2 inorganic (mineral) filters, titanium dioxide and zinc oxide. Both allergic contact dermatitis (ACD) and photoallergic contact dermatitis (PACD) have been caused by organic filters; oxybenzone (benzophenone-3) is the most frequently reported contact and photocontact allergen compared with all other UV filters. There are no reports of ACD or PACD to the inorganic (physical) UV filters. Here, we review the categories of sunscreens available, currently marketed UV filters, and their corresponding ACD and PACD.
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