USN’s Pure Protein GF-1 (formerly IGF-1) is a protein blend consisting of a precise mixture of different protein sources. Protein is the structural core of the human body & is at work in every single cell. Protein performs many essential functions in the body. It is required for growth & repair of tissues. The quality of a protein is determined by its amino acid profile. Milk & high-quality soy, combine essential & nonessential amino acids (protein building blocks) to support muscle growth & maintenance. USN’s Pure Protein provides an excellent source of protein which the body can use to build & maintain muscle tissue during & after intense physical activity. This scientifically engineered formula is a must for any athlete, body-builder or individual. Pure Protein isa great tasting shake & mixes easily. 40g of STS (sustained transport system) protein consisting of whey protein isolate (WPI) & concentrate blend, micellar casein, calcium caseinate, egg albumin & soy protein isolate Contains Zymatech multiple enayme technology (incl. lactase enaymes & fibre) for optimal protein digestion & amino acid uptake Fortified with l-glutamine for nitrogen transport & muscle recovery Extremely low in carbs & contains a complete vitamin & mineral blend