I got ISS for taking a vitamin at school one day because I left it in my pocket and forgot to take it that morning. Yes its total bs, but theres nothing I can do. I went to the student president he went to the counsel and in the end its the same old shit "any supplement, vitamin, or mineral is ISS." Of course in my school people smuggle in Jack Daniels in oranges and put acid stamps in their sandwhichs, perhaps their just being "careful."
The only way I plan on getting by with pre mixxed protien is putting it in a black bottle and say its kool-aid or some shit