About GW...
"Anti-doping authorities [now] have a test for GW1516, which is relatively easy to find in urine with existing testing procedures, as it’s not a naturally occurring substance in the body. What’s more, clinical research shows that the drug is detectable as long as 40 days after a single dose."
Source:
cyclingtips.com.au/2013/04/the-new-epo-gw1516-aicar-and-their-use-in-cycling/
Pointless.