Orange juice offers more. Its beta-carotene, a provitamin A carotenoid, can enter intestinal absorption pathways and be cleaved by beta-carotene monooxygenase 1 into retinal, which may then be converted into retinol. Vision depends on that chemistry. Retinal binds with opsin in the eye, helping drive phototransduction, the process that turns incoming light into signals the brain can read.Skin need...More