the whole casein before bed scam got pushed a lot during the 90's.. they realized they could sell guys more shit they didn't need by convincing them you need it before bed
believe it or not you are RESTRICTING GAINS by consuming anything before bed. why? because during the night is when your body is resting and repairing.. when you consume something your body is now using up energy to digest that shit instead of using energy to repair. you will grow LESS by doing that