GNC AMP Mass XXX - Chocolate: Increase Lean Muscle Mass with 40% Fewer Sets.
You can get even more out of every workout session when you make GNC AMP Mass XXX a part of your exercise routine. This protein-packed dietary supplement is clinically proven to help increase lean muscle mass with 40% fewer sets. Plus, 3g each of Tri-MG Infusion and Creatine Matrix Blend help support athletic performance and muscle protein synthesis, while micronized amino acids support key processes crucial to muscle ....
