Raeanna,
you're right that most of these sources i read from come from sites trying to sell protein products, or from bodybuilding sites. Its been rather frustrating. There's a lot of "information" out there. A lot of it is conflicting. Most of it is repeated by people who don't have much scientific knowledge about it, but are repeating what they've heard, or what has 'worked' for them.
From what I gather, muscle isn't actually breaking down, but I guess muscle building won't take place.
*frustrated*
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