I wouldnt recommend the GW 501516 for anyone to use. It was a research chem that GlaxoSmithKline was studying for fat loss and endurance I believe. Many people called it endurobol. The compound was found to significantly increase the chances of developing cancer and development of the drug was subsequently halted. It has a ton of benefits and could of been a huge health breakthrough but I believe the potential for serious negative effects outs weighs the positive effects in this case. Very interesting compound and I would bet there will be something like endurobol one day that will have similar positive effects without the potential negative consequences . Time will tell on that one. Here are some links so you can investigate. It is just not something I would recommend anyone use but that is your choice. I am a pro choice type of guy as long as you are aware of the potential negatives then it is your choice.
Here is a link to Wiki which we all know how reliable that site is (not very reliable but it addresses the issues with the drug)
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Here is a thread from AM that talks about the possible dangers of using this compound with Cox-2 inhibitors
http://anabolicminds.com/forum/weight-loss/202964-gw-501516-cox.html
WADA warns about Endurobol use and toxicity levels
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