*This product is specially made for people who are trying to gain weight, specifically muscle mass. This can include bodybuilders, athletes, or people who have a naturally fast metabolism or have difficulty gaining weight. Some people may also use our weight gainer shakes as a convenient way to increase their calorie intake if they are unable to get enough calories from whole foods alone. Our weight gainer shakes can be a helpful supplement for anyone trying to increase their weight, but they should be used in conjunction with a balanced diet and regular exercise program.