I'm soooooo tired of all the bullshitters around that claim to know. So let me tell you, from EXPERIENCE! The military does NOT test for juice unless you do something that would make them suspect you of using them, and even then it requires special command approval because the cost of testing is considerable, and testing is done by an outside testing facility, not a military facility. For example, they find evidence of use in your ROOM like vials, etc. Simply gaining weight will not cause a test to be initiated. Let's not forget, the average military person is NOT a geek, is interested in physical fitness. however, it you turn into a complete fucking asshole AND are using roids, I hope they would test you to get you the fuck outta there!
Bottom line is, if you're smart, you'll never get tested. If you're dumb, you deserve what you get.