Mutant Mass Extreme 2500 5.45kg - Triple ChocolateMutant Mass Extreme 2500 5. 45kg offers double the size of the 2. 72kg tub, delivering an even larger supply of its calorie dense formula to athletes aiming for extreme muscle growth. With 2500 calories per serving, this mass gainer is designed to support significant weight and muscle mass gains, ensuring you stay fueled for every workout and recovery period.