Perhaps, the strongest evidence that Aloe Vera protects or helps with radiation is the fact that it was the only remedy that worked with Chernobyl desaster victims. There are quite of a few research studies that were done on this benefit of Aloe Vera which you can search on the Internet. The same applies to Bentonite clay. THe next time you or anyone in your family has an injury that includes swelling (all injury involve development of toxins from dead cells, pus) put some clay on it and the next day or within an hour or two, the swelling will be way down as the toxins are being drawn out through the skin. Proof of the pudding lies in eating. One has to try to know. Some things work better for some than for others. Ultimately, the strongest healing response occurs within you, and is determined by you. If you doubt that somehting will help you, it most likely not going to produce the much-needed Placebo effect, which is important for the healing of anything in the body. Scientific evidence, though, is the least trustworthy in all of this (see first chapter of my book, Timeless Secrets of Health & Rejuvenation for more details on this subject).