332f662d_Supplements_for_Pain__effectiveness
[supplement & summary] Creatine. Marketed as “nature’s muscle builder” and an energy-boosting performance enhancer. A form of stored energy for muscles, primarily used by athletes and bodybuilders. The most legitimate sports supplement. [safety] no serious safety concerns [more information] Examine.com has an extremely detailed & heavily referenced creatine page [effectiveness] 
heavily studied, and the only major nutraceutical that probably works as advertised
Supplements for Pain
effectiveness