Optimum Nutrition, Serious Mass™ 6 lb (2.72 kg) 8 Servings

Optimum Nutrition Serious Mass Chocolate 6 lb – High-Calorie Mass Gainer with 50g Protein

Optimum Nutrition Serious Mass is a premium high-calorie mass gainer formulated for athletes, bodybuilders, and hard gainers who need serious nutritional support. Each serving delivers 1,250 calories with water (1,640 with milk), packing in 50g of high-quality protein, 250+ grams of carbohydrates, and 25+ essential vitamins and minerals.

This chocolate-flavored powder is enhanced with creatine, L-glutamine, and glutamine peptides to support strength, recovery, and muscle growth. Produced by Optimum Nutrition, one of the world’s most trusted sports nutrition brands, Serious Mass stands out for its rigorous ingredient sourcing, quality control, and cGMP-certified facilities.

Perfect for hard gainers and individuals with fast metabolisms, Serious Mass ensures you meet your calorie goals without added sugar—fueling your performance, recovery, and growth.

Key Benefits

1. High-Calorie Support: 1,250–1,640 calories per serving to meet intense energy needs.
2. Muscle Growth & Recovery: 50g protein supports muscle repair and growth.
3. Performance Nutrition: 250g+ carbs replenish glycogen stores post-workout.
4. Micronutrient Dense: 25+ vitamins & minerals for complete nutrition.
5. Extra Support: Creatine, glutamine & glutamine peptides enhance recovery and muscle volume.

Suitable For

1. Adults seeking serious weight gain and muscle growth.
2. Athletes and bodybuilders with high-calorie needs.
3. Hard gainers struggling to hit calorie goals through food alone.

Not suitable for: Children under 18, pregnant/breastfeeding women, or those with underlying health conditions without medical advice.

Suggested Usage

1. Mix 2 scoops (336g) with 24 fl. oz. (710ml) water or milk.
2. Add calorie-rich foods like fruit, nuts, or yogurt for extra calories.
3. Use between meals, post-workout, or before bed for optimal results.
4. Beginners should start with ½ serving daily and increase gradually.