Depends on how well you digest it. Some people can't do it at all (lactose intolerant) many people get bloated by milk (poorly digested) some have absolutely no problems with it. If drinking a pint makes you feel full chances are you aren't digesting it well. I put away an average of 4 pints per day and never had any problems with it.
Regarding soy, several studies have indicated soy raises Estrogen levels in males.... May not be a great idea for bodybuilding purposes. Also 2% milk has a higher percentage of protein than soy milk.
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