What do you mean purity? There are so many aloe vera brands and products out there and it Is very difficult to pinpoint one and say that this is the best. Since aloe vera itself have many properties any product that is made with it is likely to be good. Moreover, unless one has used all the different products it is not possible to pick one and say that this is the best one. It also depends on individual taste and liking as well. Besides there are different types of products such as face washes, soaps, creams, lotions and body washes and I am not sure what you are referring to.