THE PRESENT INVENTION RELATES TO AN ORALLY ADMINISTRABLE COMPOSITION FOR IMPROVING SKIN QUALITY AND PREVENT OR RESTORE AGE-RELATED ALTERATIONS OF SKIN IN HUMANS OR ANIMALS, WHICH COMPRISES AS AN ACTIVE INGREDIENT AN EFFECTIVE AMOUNT OF A MOLECULE THAT STIMULATES ENERGY METABOLISM OF THE CELL OR AN ANTIOXIDANT OR COMBINATORY ADMIXTURES THEREOF, IN AN ORALLY ACCEPTABLE CARRIER.