How do you know?

Maybe you have heard of very good performances after injections. Have you heard of very poor performances after injections? Bad performances after taking a substance that is supposed to work are often pawned off on another reason.

Its the same old stuff. In theory it sounds good. So people try herbal remedy or something else. It works on 1 out of every 10 people. It has no effect on 8 out of 10. And ill effects on 1 out of 10. Guess which results get trumpeted... check out the infomercials.