You are in an austere environment for an extended period of time without the drugs you have relied on. Also, unnecessary risk. I medevac'd more guys out of Afghanistan for health issues (normally heart / BP / etc) or injuries related to gear, than I did for combat injuries or other DNBI. Also, it can affect decision-making. . Trust me we have this conversation often about whether they should be allowed in the communities or not. That said, gear usage is extremely prevalent in SoF. Usually test, Eq, hgh, deca are common go-to’s plus lots of modafinil. Most of the guys using are not because they need it to perform, they just want to be huge. The irony is that the hypothetical best time to use would be the various selection phases when you are most broken down, that is also the hardest time to get away with it. The current practice is to "look the other way", but that doesn't make it right. My job is to run the human performance program for these guys. I will not disclose which one publically on here, but we have staffs of elite strength and conditioning coaches, performance psychologists, physical therapists, and sports medicine physicians whose sole job is to get the best out of these guys. Drugs just simply are not needed. Guys successfully performed in SoF since Vietnam without them. A SoF soldier requires millions of dollars to train, and lots of time. They cannot be mass-produced and cannot be trained effectively quickly. the potential benefit does not outweigh the risk of losing one f.