Description
Optimum Nutrition Serious Mass Weight Gainer Protein Powder
Fuel Major Gains. Not Minor Efforts.
For those who refuse to settle — for those whose goals demand serious results — Serious Mass delivers the caloric and nutrient punch needed to support heavy training, accelerated growth and big-picture muscle gain.
Massive Calories for Hard Gainers
Each full serving packs in roughly 1,250–1,260 calories when mixed with water (and even more when blended with milk) — supplying the extra energy intake many busy, high-metabolism athletes struggle to hit.
Robust Macros to Support Growth
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50 g of complete protein per serving, engineered to support muscle repair and growth.
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250 + g of carbohydrates, designed to replenish glycogen stores and fuel your most intense workouts.
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Just 5–6 g of fat, keeping the focus on calories + performance rather than excess fat.
More Than Just Calories
Serious Mass doesn’t stop at macros — it also brings:
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Creatine monohydrate to support strength & power output.
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Glutamine and glutamine peptides to aid recovery.
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A spectrum of 19+ vitamins and minerals to fill nutrient gaps and support overall health.
Ease of Use, Serious Results
Whether tossed in a blender or stirred swiftly — this simply-designed shake fits into demanding routines. Because when your focus is growth, you don’t have time to measure dozens of ingredients.
Who Should Choose Serious Mass?
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Individuals with high metabolic rates who struggle to maintain (or add) weight.
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Strength athletes or serious lifters who require a caloric surplus to add muscle.
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Anyone for whom whole-food intake alone isn’t enough to hit daily calorie/macro targets.
Usage Tip: Blend two full scoops (≈ 340 g) with 24 oz of cold water or skim milk. For added calories and creamy texture, use low-fat milk or add nut butter, banana, oats or ice for a high-impact shake.
Note: Because of the large serving size and high volume, a full-sized shaker may be too small — a countertop blender is recommended for best results.
Bottom Line:
If you’re ready to stop being “skinny guy chasing calories,” and start owning your bulk, Serious Mass provides a proven, convenient and effective tool. You bring the training — it brings the fuel.
- Optimum Nutrition’s Serious Mass Weight Gainer Protein Powder is a high-calorie, nutrient-dense supplement designed to help individuals gain weight and build muscle mass. Packed with 50 grams of blended protein, over 1,200 calories, and 250 grams of carbohydrates per serving, this chocolate-flavored powder provides a convenient and efficient way to increase daily caloric intake.Immune Support: Fortified with over 20 vitamins and minerals, including Vitamin C and Zinc, to support immune health.
- Versatile Consumption: Can be mixed with fruits, peanut butter, nuts, and other calorie-dense foods for added nutritional value and customization.
- Multi-Source Protein: Features a blend of whey protein concentrate, casein, and egg albumen for sustained muscle nourishment.
- Gluten-Free Formula: Suitable for individuals following a gluten-free diet.


















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