I recently stumbled across this article by Total Health:
Aloe vera is an ancient medicinal plant whose anti-inflammatory, antiseptic, wound-healing, antidiabetic, antioxidant, and cancer chemopreventive qualities have attracted significant scientific interest.
Research has shown that the compounds and constituents of Aloe vera play a vital role in the prevention and control of numerous diseases, especially those related to aging, such as cancer, coronary vascular disease, and diabetes, as well as immune system enhancers and in the management of oxidative stress.