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Serious weight gain goals require serious calories.
Serious weight gain goals require serious calories. Unfortunately, those who need the extra calories most often have a hard time consuming enough of them. For many aspiring to be bigger, a highly- active metabolism, weaker appetite and on-the-run lifestyle can make it a real challenge to get enough calories from food. With 1,250 calories and 50 grams of protein per serving, you�ve got lots to gain from ON�s Serious Mass. Get serious about your sizable ambitions with Serious Mass.