I've noticed an unbelievable reduction of acne-pimples on my neck and back, something that I and my doctors have been trying to battle since the age of fourteen. For six years, nothing has been of any help, and the last few years I haven't even bothered with it. Since it doesn't affect my face anymore, I've just kept my back and neck covered an often as possible.
Three weeks ago, my neck was (as usual) covered in an uncountable number of pimples all the way around it, and now only maybe five or six remain - something that has never really happened for probably five to six years.