People with normal white skin, who require protection from the sun, need a topical agent which absorbs in the ‘sunburn’ part of the ultraviolet region (wavelengths 290 – 320 nm). Those people who show abnormal sensitivity to sunlight may react to similar wavelengths, or to longer wavelengths which on normal skin cause no reaction. Sunscreen preparations are therefore required for two distinct purposes.
Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.