Not sure on the t-mag thing. But I read a news article cant' find it right now. And a dietician talked about Muscle Milk and said it was off label claim, just by tasting it. Went on to say it was basically a mix of cake batter, and added protein.
I use it to make
malts with, throw a bit of ice cream, and some strawberries, and malt mix, then some whip cream, good for a treat