I'm no doctor, but I am curious if any research has been conducted on whether this treatment would be beneficial for preventing AD in people in "at-risk" populations. Perhaps it could be used to stop the plaques from forming to begin with.

I could see this treatment being something like exercise and diet for type-2 diabetes. Exercise and diet may help prevent diabetes, but neither will "cure" the condition once the point-of-no-return has been crossed. In other words, you can turn a cucumber into a pickle, but you can't turn a pickle back into a cucumber.