Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)

Description

💥 Bulk up smarter, not harder with Serious Mass!

Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,250 calories and 50 grams of protein per serving, enhanced with 22 vitamins and minerals for immune support. Its versatile powder formula lets you customize shakes with calorie-dense add-ins, making it the go-to choice for serious muscle gain and recovery.