 Aloin is usually prepared by extraction from aloe latex (the term "Cape aloe" also refers to the dried latex of the leaves of several species of the genus "Aloe", especially "A. ferox" [Blumenthal, 1998]), the bitter yellow exudate that seeps out from just underneath the skin of aloe leaves.The latex is then dried and powdered to make the final product, often made into tablets or a beverage, though aloin does not have good stability in aqueous solutions.Products derived from the gel of the aloe plant do not contain appreciable amounts of aloin, and have not been proven effective for any disease or condition when taken orally.