?-Carotene is the second common form of the orange photosynthetic pigment, carotene (?-carotene is the most common), and possesses a ?-ring at one end and an ?-ring at the other. Humans and other mammals can produce retinal (a form of Vitamin A) from the retinyl group(?-ionone ring) of ?-carotene, though its activity in this role is less than that of ?-carotene, which has two retinyl groups. ?-carotene is found in high concentrations in yellow-orange vegetables, such as carrots and squash, and dark-green vegetables, such as broccoli and spinach. High blood levels of ?-carotene in adults has also been recently linked to lower mortality rates. It is useful as a control for HPLC.
Uniformity of Dosage Units
Allschoolabs
Uniformity of Dosage Units is a specialised analytical laboratory service that assesses whether individual dosage units contain sufficiently consis...



































