Optimum Nutrition Serious Mass – High-Calorie Weight Gainer

Build Big. Recover Right. Gain Serious Mass.

Optimum Nutrition’s Serious Mass is the ultimate weight gainer formula, designed for athletes and hard-gainers who need serious calorie support to build muscle mass and strength. Each serving delivers a massive 1,250 calories, packed with 50g of high-quality protein and over 250g of carbohydrates to help you fuel recovery, boost calorie intake, and maximize gains.

Formulated with vitamins, minerals, and creatine, Serious Mass supports not only size but also performance and overall health. Whether you’re bulking up, struggling to gain weight, or fueling intense training, this is the go-to mass gainer to get results.

Key Benefits:

• 🥤 1,250 Calories per serving (with water), perfect for high-calorie needs

• 💪 50g Protein from a blend of whey, casein, and egg protein sources

• 🍞 250+g Carbohydrates to replenish energy and support muscle growth

• ⚡ 3g Creatine Monohydrate to improve strength and power output

• 🥬 25 Vitamins & Minerals for comprehensive nutritional support

• 🍫 Available in delicious flavors like Chocolate, Vanilla, Strawberry, and Banana

Suggested Use:

Mix 2 heaping scoops (334g) with 700–900ml of water or milk. Take between meals, post-workout, or before bed to boost daily calorie intake and recovery.

Whether you’re bulking or breaking plateaus, Serious Mass gives you the fuel you need to grow bigger, stronger, and more powerful — fast.