I don't think the military (or any other hosipital) does a drug screen in your blood work pre-op. The things they will be testing for are platelet counts, clotting factors, clotting times, WBC, and maybe triglycerides. Your triglycerides could be high depending on the amount and time of your last use. The best thing to do is to tell the doctor that your courious about what labs they are pulling and take it from there. I would ask first before worrying. If they pulled a testosterone lab then you better have an explanation ready, but pulling a test lab before surgery would be very odd, unless they are suspicious about you juicing. Even then, I think they would tell you first that they were going to pull a test lab if you asked before hand.