GW501516 (and the other "SARM"s) was voluntarily pulled from shelves by the main stream supp companies, probably due to lawsuit threats from other companies under the Lanham Act, but that's a complete guess. It's still available from Research Sites. It is "Gray Market" - not exactly legal, not exactly illegal. Glaxo-Smith-Kline ceased development due to concerns relating to cancer. Big "Bro" debate in that area. It was only ever "proven" in mice for endurance/fat loss, at an HED of 0.41mg/kg - i.e. a 220lb man would need at least 41mg.
