Aloe (Aloe barbadensis): Commercial aloe juice is made from the inner leaf, which is blended and strained, with a preservative added. To make aloe “gel”, the juice is thickened with seaweed to mimic the leaf’s original thick consistency. The crystalline part called aloin, a brownish gel found alongside the leaf blade, is powdered and used in some commercial laxatives. It is so strong that [...]