Diffey B L, Farr P M
Br J Dermatol. 1985 Jan;112(1):83-6. doi: 10.1111/j.1365-2133.1985.tb02295.x.
The photoprotection afforded by three sunscreens available by prescription in the U.K. has been studied in patients with severe broad action-spectrum photosensitivity. All products investigated exhibited high protection against UV-B radiation in accordance with the protection factors quoted by the respective manufacturers. On the other hand, the protection against UV-A ranged only from fair to poor. The need for a sunscreen which has good protection against UV-A is shown to be important for the satisfactory management of patients with severe broad action spectrum photosensitivity.
