Product Overview.

Bulk up, build muscle, and crush your weight gain goals with Optimum Nutrition’s Serious Mass—a high-calorie, nutrient-dense formula designed for serious athletes and hard gainers. Packed with 1,250 calories, 50g of protein, 252-254g of carbohydrates, and 3g of creatine monohydrate per serving, this powerful mass gainer supports muscle growth, strength, and recovery.

💪 Key Benefits:
✔ High-Calorie Formula – 1,250 calories per serving to fuel serious weight gain.
✔ Muscle-Building Support – 50g of premium protein for lean mass growth & recovery.
✔ Carb-Powered Performance – 252-254g of complex carbs for sustained energy & muscle fuel.
✔ Enhanced Strength – 3g of Creatine Monohydrate to support performance & power.
✔ 25 Essential Vitamins & Minerals – Supports overall health and nutrient balance.
✔ Versatile & Customizable – Blend with milk, fruit, or nut butters for extra calories & flavor.

Serious Mass gives you the ultimate nutritional foundation to bulk up and pack on quality muscle mass—helping you achieve the size and strength you’ve been working for.