I have used it and whatever it is it works. I say that because I read that real LGD 3033 is hard to come by. I got mine from Americanresearch.net
It was effective, started at 10mg a day then up to 20mg a day, ran enclomiphene with it. Strength increased quickly and had a vascular, hard look, with full muscles. Only side I noticed was increased hair shedding. I will run it again. I read that LGD 2226 shows promise as well, but it has yet to get out into the market.