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VPX Sports MPS-10 Delicious Multifunctional Pre-, Intra- and Post-Workout Drink Looking for a great-tasting drink you can have pre-, intra, or post-workout? Well, Muscle Protein Synthesizer is the product for you! MPS-X10 contains a full spectrum of essential amino acids (EAAs), which are the building blocks of muscle. Recent research suggests that EAAs are superior to branched-chain amino acids (BCAAs) for increasing muscle protein synthesis. What separates MPS-X10 from every other amino acid supplement on the market is the 2:2:1 leucine, isoleucine, and valine ratio of the BCAAs it contains. Many supplement companies erroneously have increased Leucine content in the BCAA profile; however, this is scientifically flawed. MPS-X10 contains 10 grams of EAAs which is considered the optimal dose of EAA’s to maximally stimulate muscle protein synthesis. 10,000 mg essential amino acids (EAAs). 7,500 mg branched-chain amino acids (BCAAs). Scientifically proven 2:2:1 ratio of leucine to isoleucine and valine. Other Ingredients: Malic Acid, natural flavors, citric acid, and sucrose.