This stack includes the massively successful AST (AST Sport Science) products VP2 and Creatine HSC with a free Sportys Health shaker. This combo is designed to aid lean muscle growth and significantly increase strength and recovery. AST VP2 is regarded as the worlds best protein powder as it contains hydrolysed Whey Protein Isolate (WPI), which is a predigested form of protein. This form of protein is the most available to muscle tissue and is regarded as the best form of protein for muscle growth as it is massively superior at absobing. The inclusion of AST Creatine HSC delivers a creatine product that is spiked by carbs and amino acids once again increasing absorption and hence results. In store we sell lots of AST VP2 and HSC and continually get positive feedback about both products and in particular stacking them together. I would highly recommend considering AST GL3 (L-Glutamine) as an addition to this stack to make it a complete Strength, recovery and muscle building formula.