I have no idea which version
Courtney was on. My sister has lost 78 pounds in the last few months using the Isopure Zero Carb shakes, she cut out carbs and did cardio three times a week. She looks really good and it's making me want to try them. I don't see a difference with the mix, and the premixed only for some it's probably easier to carry around the premix than walk around with a packet of shake powder. I think i want to try the cookies & cream kind.