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Annatto, a dye extracted from Bixa orellana seeds, is used as a color additive in butter, cheese and in a variety of other foods as well as in drugs and cosmetics. Toxicological data on annatto and on its main carotenoid pigment bixin are still scarce. In this study we evaluated the developmental toxicity of annatto (28% of bixin). Annatto (0, 31.2, 62.5, 125, 250 and 500 mg/kg body weight/day) was...