Disclosed is a novel composition which has a function of accelerating production of collagen. The composition has high light stability and is free from side effects such as those of retinoids.Specifically disclosed is a collagen production accelerating composition which contains one or more compounds selected from the group consisting of D-aspartic acid, D-alanine, derivatives of D-aspartic acid or D-alanine and/or salts of D-aspartic acid or D-alanine. The composition may be used for the purpose of suppressing and/or improving skin conditions. The skin conditions may include but is not limited to photoaging and/or wrinkles. The composition may be used for an external preparation for the skin or food. The composition may be a type I collagen production accelerating composition.
