there was a post somewhere where a guy claimed he did regrow his hair using HGH, but it was the expensive, injected type.
i also remember reading the post and there was no proof to his claim, so i can't say whether or not it was legit.
i doubt OTC drugs could have anywhere near the same affect. i think HGH releasers just stimulate the production of HGH. maybe this has a toll on the body or some kind of other side affect.
you can increase HGH levels naturally with allot of exercise, proper sleep and a low GI diet.