Bodybuilding.com Signature Mass Gainer

Signature Mass Gainer is a simple - and clean - way to go from skinny to stacked. It's fully stocked with 810 calories, 50 grams of muscle-building protein, and 133 grams of carbohydrates. Probiotics help your body utilize the protein to its fullest. So, if you can't seem to get enough mass-making nutrition in your day, skip the drive-thru and have a rich, satisfying shake.*-Support Muscle Growth to Put on Mass* -Premium Mass Gainer for Clean Bulking* -50g of Muscle-Building Protein* -Probiotics to Improve Digestive Health* -Ideal for Post-Workout to Support Muscle Recovery and Growth* We've put together a killer blend of high-quality protein sources to provide key muscle-building amino acids. The majority of the protein comes from clean, fast-digesting whey protein isolate. Milk protein concentrate and whey protein concentrate boast high bioavailability and supreme amino acid profiles. Casein rounds out the dairy proteins, providing a slow release of amino acids that supports muscles for hours. Carbohydrates are key for a mass-gaining diet. They provide your muscles and liver with the fuel you need to lift big and train hard. Maltodextrin provides fast-digesting carbohydrates while ModCarb and Cluster Dextrin provide slower-releasing carbs that have less of an impact on blood glucose levels.* Remember: Fat is not the enemy! It's a valuable tool for clean bulking. Our bodies need some fat to produce hormones, build cell walls, absorb fat-soluble vitamins, construct neurons, and carry out many other important functions. This formula packs a serious caloric punch so the probiotics in our Signature Mass Gainer have been developed specifically for use in powder supplements. When you're on a mass-gaining diet, a little digestive health support goes a long way. And, of course, protein absorption is crucial to making lean muscle gains.*

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