Functional compound which combines the antioxidant, anti-aging and bleaching properties of Ascorbic acid with the mild keratolytic, moisturizing, anti-irritant and healing properties of Allantoin. Active ingredient useful for the protection from free radicals and UV damage, treatment of signs of aging, to promote skin renewal and to stabilize oxidizable ingredient. Particularly suitable at 0.2-1% for anti-aging and aged-skin products, skin bleaching preparations, sun care and hair care.