Although Whey is sold as "high protein", it is actually the GLUE in milk, and causes mucous like mad in those who are prone to sinus infections, and/or are lactose intolerant.
I'd go with non-fat milk, and not use it too often. It's worth paying attention. God bless you. : )
If you can't find an answer, I'd call or email the company that makes the whey and ask them. Also look up other companies that make whey and check out there web sites and ask them too.
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