Aloe emodin
Aloe emodin is an anthraquinone and an isomer of emodin present in aloe latex, an exudate from the aloe plant. It has a strong stimulant-laxative action. Aloe emodin is not carcinogenic when applied to the skin, although it may increase the carcinogenicity of some kinds of radiation.
Aloe emodin is found in the gel, sap or leaves of aloe vera, the socotrine aloe, and Zanzibar aloes, the bark of Frangula and cascara sagrada, the leaves of Senna, and the rhizome of rhubarb.
Aloe-emodin has not been found in Natal aloes.