All in all there are 300 different types of molecules in the Aloe Vera according to the "The Handbook of Photochemical Constituents of GRAS Herbs and Other Economic Plants" by James A. Duke. Thus giving it a variety of effects on many different types of tissues. Throughout the centuries Aloe vera has been used by millions of people all over the world. Empirical evidences accumulated praise this plant as "miracle plant" or "burn" plant ", but the validity of this historical record is not accepted.