Agreed ! So much so it is a banned ( or was banned ) in the Olympics. I beleive they gave that snowboarder back his medal, I beleive, because they ruled it worked  OPPOSITE of a ' performance  enhancing  drug' .  They were wrong. In his case they should of took his testimony that it improved his snowboarding  (right from the horses mouth.) He said it after he got his medal back. They could have retake it.