Optimum Nutrition’s Serious Mass protein powder is packed with enough nutrients and calories to provide serious weight gain. Each serving of Serious Mass supplies a fully loaded energy source of over 1,250 calories, 250 grams of carbohydrates and 50 grams of quality proteins. It is also enriched with 25 essential vitamins and minerals, additional creatine, glutamine and its precursors. The protein blend in Serious Mass is made from a combination of rapid and slow-digesting sources, which include whey, casein and egg. This ensures the sustained release and absorption of protein nutrients by the body necessary for optimal muscle growth and recovery.

One serving of Serious Mass consists of two heaped scoops of the protein powder supplement, mixed with of cold water. To create a thicker, creamier and a higher calorie shake, two heaped scoops can be mixed with non-fat milk instead of water. The usual intake of Serious Mass is ½ to 1 serving in between meals, in order to maintain positive nitrogen balance and to support a high-calorie diet.

Before buying this protein powder take not of the low Protein Percentage of 15% and compare this to other Gain Mass products.  Note also that its Carbohydrate level is the highest in the Gain Mass category.