Disclosed is a stable and safe antioxidant composition which can be used routinely. Specifically disclosed is an antioxidant composition which contains one or more compounds selected from the group consisting of D-aspartic acid, derivatives thereof and/or salts thereof. 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 fine wrinkles, rough skin, dry skin, skin cancers, skin allergies, inflammation of the skin and photosensitive dermatosis. The composition may be used for an external preparation for the skin, food and a pharmaceutical product for cataract.本發明係開發一種日常可使用之既安定且安全之抗氧化組合物。本發明提供一種抗氧化組合物,其含有選自由D-天冬胺酸、與其衍生物及/或鹽所組成之群組之一種或兩種以上之化合物。上述組合物可用於皮膚狀態之抑制及/或改善。上述組合物可適用之上述皮膚狀態包含小皺紋、肌膚粗糙、乾燥、皮膚癌、皮膚過敏、皮膚之炎症及光線過敏性皮膚症,但不受此限定。上述組合物可用作為皮膚外用劑、食品及白內障用醫藥品使用。