I am 3 weeks post op and get nauseas with shakes, not sure why. I found a 3oz protein shot at GNC. It's called New Whey protein shot that comes in different flavors with no carbs or fat, 42 grams of protein and 180 calories. When I paid the lady at the register said "you do know you can only absorb so much protein at a time right? The rest just goes right through your liver" I said thanks and left. The whole evening I've been thinking about this. I guess I can take half the shot and the other half later. Then complete my 60 grams of daily protein with food. But I can't stop wondering about what she said. I'm googling and I get different amounts 25 gr, 30 gr.. . .does anyone know more about this?

Collagen is made from boiled cow hide. I don't think it could possibly be a good source of protein. I learned early that protein shots are not only a waste of money,they aren't good for anyone.