A stabilized carotenoid-based pigmenter free of synthetic antioxidants for the addition to animal feed to add color to tissues of animals fed the animal feed. The carotenoid-based pigmenter contains free-form carotenoids obtained from natural sources through a saponification reaction. A natural antioxidant, such as grape seed extracts, green tea extracts, clove bud oil, clove leaf oil, Vitamin C, cinnamon leaf oil, oleoresin turmeric, tocopherol, tocotrienol, rosemary extracts and gallic acid or salts thereof combined with a diluent, preferably glycerol or a glycerol-like substance, is added to the pigmenter after the saponification reaction.