PT - JOURNAL ARTICLE ED - , TI - Topical sunscreens AID - 10.1136/dtb.28.16.61 DP - 1990 Aug 06 TA - Drug and Therapeutics Bulletin PG - 61--63 VI - 28 IP - 16 4099 - http://dtb.bmj.com/content/28/16/61.short 4100 - http://dtb.bmj.com/content/28/16/61.full SO - Drug Ther Bull1990 Aug 06; 28 AB - Ultraviolet (UV) radiation reaching the earth consists of UVB (wavelengths 290–320 nanometres) and UVA (320–400nm). UVC (100–290nm) is still stopped by the ozone layer. UVB causes sunburn, but both UVB and UVA cause skin cancer and skin ageing. Severe sunburn may be a risk factor for melanoma.1 Numerous sunscreens are used to prevent sunburn or to protect patients with photodermatoses; which ones should be recommended?