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- Title
The efficacy and safety of sunscreen use for the prevention of skin cancer.
- Authors
Sander, Megan; Sander, Michael; Burbidge, Toni; Beecker, Jennifer
- Abstract
Several well-conducted randomized controlled trials with long follow-up showed that sunscreen use reduces the risk of squamous cell and melanoma skin cancers. However, reapplication is suggested when the likelihood of sunscreen having been removed is high, such as after sweating, water immersion, friction from clothing and exfoliation from sand.[39]-[41] When swimming or sweating are anticipated, water-resistant sunscreens should be used.[40] Spray-on sunscreens are less desirable than cream-based ones, for several reasons. Moreover, because spray-on sunscreens are often fast drying, and sometimes not clearly visible once sprayed onto the skin, it is difficult to determine whether application was homogeneous.[42] Aerosolized sunscreens are also flammable, and several incidences of combustion on the skin have been reported after exposure to open flames, even after the sunscreen has been allowed to dry. Advances in formulation and micronization of physical ultraviolet radiation filters has led to more cosmetically acceptable physical sunscreens.[49] Endocrine effects Low-quality evidence has led to concerns about possible estrogenic and antiandrogenic effects of chemical sunscreens.
- Subjects
SUNBURN; SKIN cancer; SUNSCREENS (Cosmetics); CANCER prevention; CORAL bleaching; RADIATION injuries; RANDOMIZED controlled trials
- Publication
Canadian Medical Association Journal (CMAJ), 2020, Vol 192, Issue 50, pE1802
- Publication type
journal article
- DOI
10.1503/cmaj.201085