2 days only. A combination of BOGO 50% (2 x 4LB for $86) and additional 25% OFF $49 at Vitamin World drops the price for the highly acclaimed Carnivor Protein Isolate to $65.23 + Free Shipping. Just add two 4lB tubs to your cart (you can mix & match flavors). This is the lowest we saw for this Isolate and a current low by at least $30 shipped! Rated 9/10. Bioengineered Beef Protein Isolate. More Concentrated Than Steak Or Whey Isolate.