How do mass gainers work? People who engage in vigorous physical activity frequently need to eat more meals to replenish lost nutrients. A handy option to increase calorie intake is by using a supplement that has more protein and carbohydrates. Mass gainers are frequently consumed as a shake-like beverage. Different levels of macronutrients can be found in mass gainers. … [Read more...] about What is a Mass Gainer, Do You Require a Bulk Gainer?