Product Description
Optimum Nutrition Serious Mass – the ultimate weight-gainer shake delivering 1,250 kcal, 50g protein, 250g carbs per serving. Engineered for hard gainers, bulking phases, or anyone needing a calorie surplus without added sugar.
- 1,250 Calories – massive energy surplus in one shake
- 50g Protein – blended whey, casein & egg for sustained release
- 250g Carbs – maltodextrin & oat powder for glycogen reload
- Creatine + Glutamine – 5g creatine monohydrate & glutamine peptides
- 25 Vitamins & Minerals – full micronutrient support
- No Added Sugar – vegetarian-friendly & Informed Choice certified
Why Serious Mass?
Designed for athletes and hard gainers who struggle to consume enough calories through whole foods alone. Each 2-scoop serving delivers a research-backed 1,250-calorie payload with a 5:1 carb-to-protein ratio – ideal for rapid weight gain, muscle recovery, and refuelling after intense training.
Enhanced with creatine monohydrate, glutamine, and glutamic acid to support strength gains and immune function. Every batch is produced in EU-licensed facilities and rigorously tested for banned substances – trust the gold standard.
Mixes thick and creamy in under 30 seconds. Add to milk for 1,600+ kcal or blend with oats, peanut butter & banana for the ultimate mass-building smoothie.
Suggested Use
Add 2 heaped scoops (334 g) to 700–800 ml cold water or whole milk. Blend or shake for 30–45 seconds until smooth. Consume between meals, post-workout, or before bed. Start with 1 scoop if new to high-calorie gainers and build up tolerance.
Pro Tip: Split into two half-servings throughout the day to improve digestion and nutrient uptake.