van den Bergh, HubertWagnieres, GeorgesLange, NorbertDoegnitz, NoraSalomon, Denis2015-09-222015-09-222015-09-222003https://infoscience.epfl.ch/handle/20.500.14299/118385A method for hair removal from a skin area by selective photo-inactivation of the pilo-sebaceous apparatus using ALA, derivatives of ALA, for example those with alkylene-glycol chains. Selectivity of the method is further enhanced by treatment of the epidermis by agents reducing PpIX levels in the epidermis. Side effects are diminished by using short drug/light intervals.patentCA2463345US8235974ES2324651DK1443891PT1443891DE60231734AT426394EP1443891AU2002340698US2005124984EP1443891WO03041673CA2463345WO03041673EP13123538184246