Likely protein quality from a milk factory

[SteelWeaver]

Some guy at school today asked me if I'd be interested in whey protein at cost price. I asked him what kind, he said, er, whey. No, but, like, whey isolate? concentrate? cross-flow filtration?

Well, he hadn't heard of those, but said he'd get the nutritional info from his source, someone who has a connection to a large milk processor/manufacturer.

What's the product he's offering likely to be?

 

[JJFigure]

Hard to tell - it could either be whey isolate or whey concentrate. I know allthewhey.com gets their whey isolate and whey concentrate from a cheese manufacturer.

It might also be casein...