Mass gaining supplements or powders is often referred to as mass gainers or weight gainers. These supplements are designed to be loaded with high quality protein and carbohydrate, low in fat but dense in calories. When trying to "bulk up" and increase muscle mass it is essential that you consume a large amount of calories. This can prove to be very challenging to get a large amount of calories with diet alone. That is where mass gainers come in to play. There can provide you with a high calorie shake that your body will need when trying to add mass. Bodybuilding Warehouse performance mass is a superb weight gainer that we highly recommend. Give it a try today and see the mass you put on.