American Journal of Clinical Dermatology

, Volume 2, Issue 3, pp 131–134 | Cite as

Photoprotection by Sunscreens

  • Lubomira Scherschun
  • Henry W. LimEmail author
Current Opinion


Ultraviolet (UV) radiation is an etiologic factor for the development of nonmelanoma skin cancers and also possibly melanoma. The American Academy of Dermatology currently recommends the daily use of sunscreens with a sun protection factor (SPF) of 15 or above. The SPF numerical rating is an in vivo, standardized measure of sunscreen efficacy. SPF assessment predominantly reflects the ability of a product to screen UVB radiation. The physical and biologic properties of UVA radiation are relevant as UVA contributes to photoimmunosuppression and photocarcinogenesis. An ideal sunscreen assessment system would address both UVB and UVA protection. However, the SPF rating should continue to serve as the major determinant of sunscreen efficacy.


Actinic Keratose Nonmelanoma Skin Cancer Minimal Erythema Dose Urocanic Acid Sunscreen Product 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Adis International Limited 2001

Authors and Affiliations

  1. 1.Department of DermatologyHenry Ford HospitalDetroitUSA

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