ON Serious Mass (12lbs)
For Muscle Building & Weight Gain Goals 1,250 Calories per Serving to Help Boost Calorie Intake ¹ 50 Grams of
UNIVERSAL NUTRITION ANIMAL M-STAK HARD GAINER’S
Having trouble gaining size despite pounding food and training your ass off? You’re probably a “hard gainer”. Animal M-Stak, a non-hormonal muscle-building supplement, induced anabolism without manipulating hormone levels.