When I went to AVROC in 84 they viewed taking a multi-vit as “self medicating.” Not a good thing as far as they were concerned. We had a little time on the weekends and could go to the BX. Many of us would sneak a bottle of multi-vits in then dump them before an inspection. Our inspections were well known in advance and they would destroy our lockers so dumping was the safest way to stay out of trouble.
As long as you did not forget to lock your locker in the morning before you left for class, you were ok. Suprise inspections were rare unless you really messed up.
But God help you if you forgot to lock up your locker. I remember one time I screwed up and didn’t get locked up, we could smell the foot powder in the air as we returned to the battalion. Man those DI’s could make a mess out of your stuff and room. Then I had to do jumping jacks forever to get my rifle and lock “paid off.”
Anyhow, If you can sneak in some supps or vits, good luck. As they say it is easier to ask for forgiveness than for permission. If you get a little time on the weekends do what you can (pushups, pullups,one leg squats.) Eat as much as you can, drink lots of milk. (We had almost unlimited access to milk at meals.)
Remember the bigger picture, finish the training. Then you can get back to the gym.
Give them hell and make them like it!