Aloin, a compound found in the exudate of some Aloe species, was the common ingredient in over-the-counter (OTC) laxative products in the United States until 2002 when the Food and Drug Administration banned it because the companies manufacturing it failed to provide the necessary safety data.[52][53] Aloe vera has potential toxicity, with side effects occurring at some dose levels both when ingested or applied topically.[50] Although toxicity may be less when aloin is removed by processing, Aloe vera that contains aloin in excess amounts may induce side effects.[3][6][54]
Aloe vera juice is marketed to support the health of the digestive system, but there is neither scientific evidence nor regulatory approval to support this claim.[55] The extracts and quantities typically used for such purposes appear to be dose-dependent for toxic effects