Syntrax Whey Shake - Whey Protein Concentrate Chocolate Shake - 5 lbs contains Promina brand whey protein concentrate as the only source of whey. Syntrax is proud to be able to state this as a fact. This whey concentrate is the purest, most undenatured and healthiest brand of whey protein in United States, and it tastes great! This product provides all the nutritional benefits of whey: it promotes protein synthesis in the muscle and muscle recovery, enhances performance and muscle strength, as well as boosts the immune system. Syntrax Whey Shake - Whey Protein Concentrate Chocolate Shake - 5 lbs is easy to mix, great to taste and the smell is simply alluring.