abstract |
Cosmetic compositions containing, by weight, from 0.0005 to 5% by weight of purine and / or purine derivative (s) and from 0.0001 to 5% by weight of at least one biochinone of formula (I) in which X, Y, Z are each independently -O- or -NH- or NR 4 - or a chemical bond, R 1 , R 2 , R 3 independently represent a hydrogen atom or an optionally substituted aryl group or an optionally substituted (C 1 -C 6 ) alkyl group or a hydroxyalkyl group or a polyhydroxyalkyl group or an optionally substituted (C 1 -C 6 ) alkylene group, or a (C 1 -C 6 ) acyl radical, wherein preferred radicals are independently selected from -H, -CH 3 , -CH 2 CH 3 , - (CH 2 ) 2 CH 2 , -CH (CH 3 ) 2 , - (CH 2 ) 3 CH 3 , -CH (CH 3 ) CH 2 CH 3 , -CH 2 CH (CH 3 ) 2 , -C (CH 3 ) 3 , R 4 is -CH 3 , -CH 2 CH 3 . - (CH 2 ) 2 CH 2 , -CH (CH 3 ) 2 , - (CH 2 ) 3 CH 3 , -CH (CH 3 ) CH 2 CH 3 , -CH 2 CH (CH 3 ) 2 , -C ( CH 3 ) 3 and n is from 1 to 20, preferably from 2 to 15 and in particular 5, 6, 7, 8, 9, 10, lead to beneficial effects on skin and hair. |