Patent ID: 7572933

Claim:
A method of treating a skin or a hair condition by topical application of a compound of formula (I) or a salt thereof; wherein: R is selected from hydroxy, alkyl, substituted alkyl and halogen; R′ is selected from alkyl, substituted alkyl and heterocyclic; R″ is selected from alkyl substituted alkyl, aryl and heterocyclic; M is selected from H, Li, Na, K, Ca, Mg, Zn, Mn, Cu, Fe, Co, Mo, V, Cr, ammonium, alkyl ammonium and nitrogen heterocyclic ammonium; wherein said skin or hair condition is selected from a group consisting of acne, darkened skin, dark circles around the eyes, stretch marks, wrinkles and fine lines, loss of collagen, loss of skin pliability, hair graying and combinations thereof.