GF Pro. Zero carb, zero fat GF Pro contains a proprietary blend of the highest quality whey protein isolates available combined with a remarkable spray dried plasma protein that is comprised of peptides (IGg, transferrin/lactoferrin, IGF-1, TGFâ-1) with potent anabolic and immunoprotective functional properties. This remarkable protein has been proven scientifically to lead to increases in lean tissue mass through its ability to optimize protein utilization. Therefore the net result of the proprietary formulation, GF Pro, is the most advanced protein supplement ever created.