Optimum Nutrition Serious Mass (Vanilla)

Optimum Nutrition Serious Mass (Vanilla) is a high-calorie mass gainer designed to help build size and strength. Each serving delivers 1,250+ calories, 50g of protein, and over 250g of carbs, plus creatine, glutamine, and 25+ vitamins and minerals. The Vanilla flavor offers a smooth, versatile taste that's great for blending with fruits or nut butters. Ideal for hard gainers, it’s best used post-workout or between meals to support serious muscle growth and recovery.