
Nijel Amos, 800m star, provisionally suspended ahead of world champs
Botswana's Nijel Amos, the joint-third-fastest 800m runner in history, has been provisionally suspended and is in line to miss the world championships.
Amos won Silver at London where the WR was set that day by Kenya's David Rudisha.
Tested positive for GW1516 which in mouse studies boosted endurance by 70%:
But the trials were killed & no human clinical were done after some of the mice developed cancer.
Can be detected up to 40 days after a single 15mg dose:

Detection of PPARδ agonists GW1516 and GW0742 and their metabolites in human urine - PubMed
Peroxisome proliferator-activated receptor-δ (PPARδ) agonists are the drug candidates with potential performance-enhancing properties, and therefore their illegitimate use in sports should be controlled. To simulate the metabolism of PPARδ agonist GW0742, in vitro reactions were performed which...