starting with penis shrinkage.. are u crazy? of course it doesnt.

creatine can improve performance in high intensity exercise lasting around >30secs.

It can easily be bought over the counter as it is legal (It will always be legal because it is a natural amino acid that the body produces). However because it is bought over the counter doesnt mean it is safe and you cant tell how pure it is. Perhaps the persons who seem to claim increased energy could equate this to what ever else is in the substance they are taking.

As for increased energy in exercise lasting longer than 90secs watch out for the weight gain due to water retention this could slow you down.

I may sound like I am against creatine but im not. I think if I knew more about it Id be taking it myself. I know that taking it with carbohydrate improves efficiency and any concerns over kidneys is yet to be proved scientifically so its pretty much safe. All drugs and substances do come with side effects and risk of toxicity so take the creatine in moderation and think about it if you have a gentic ceiling and can only absorb so much then you could end up with some expensive urine and the possiblity of kideny damage in the long run.

Some people will be non-responders and I think people with high amounts of fast twitch II fibres will benefit most.