Abstract: The invention relates to the use of a compound or several compounds from the group of bioquinones a) in combination with a compound or several compounds from the group of potassium channel openers and/or b) in combination with a compound or several compounds from the group of 5-alpha-reductase inhibitors, for the production of cosmetic or dermatological preparations for treatment of the scalp and for hair in order to prolong the anagenic phase and/or for the treatment and prophylaxis of seborrhoeic symptoms, optionally by additionally using one or several compounds from the group formed from carnitine, arginine, succinic acid, folic acid, conjugated fatty acids and respectively the derivatives thereof, in addition to antioxidants.