Milk is a Casein protein isn’t it? I never said people cannot digest milk protein. No silly. Milk IS BOTH casein and whey.
Whey and casein together is not only not bad, it’s highly recommended and will lead to better gains (muscle gain AND fat loss) than whey protein alone.
IMO, except around workouts, whey protein alone will limit muscle growth and also limit fat loss.
Theoretical date, and real world results typically do not line up. People were getting huge and shredded long before a certain blend of casein/whey became so popular. In fact, lots of people still get ripped eating only Whey. Its the marketing…