What is Aloe ferox?

Aloe ferox, also known as Cape Aloe, Bitter Aloe,Red Aloe and Tap Aloe, is a species of aloe indigenous to South Africa's Western Cape, Eastern Cape, Free State, KwaZulu-Natal, and Lesotho.
Its leaves contain two juices; the yellow bitter sap is used as a laxative, and the white aloe gel is used in health drinks and skin care products.