Build serious size with Optimum Nutrition Serious Mass 5.44kg (16 Servings) — the ultimate high-calorie mass gainer loaded with protein, carbs, and essential nutrients to help you gain weight and muscle fast.

✅ 1,250+ Calories & 50g Protein per Serving
✅ Rich in Carbs, Vitamins & Minerals
✅ Supports Muscle Growth & Recovery
✅ Ideal for Hard Gainers & Bulking Phases
✅ Delicious Flavors – Easy to Mix & Digest
✅ 5.44kg Bag – 16 Powerful Servings

Perfect for athletes and lifters in Egypt who want to increase size, strength, and overall muscle mass effectively.