Optimum Nutrition Serious Mass 12 lbs is a high-calorie weight gainer designed for hard gainers who struggle to gain size and muscle mass. Each serving delivers an advanced blend of high-quality protein, complex carbohydrates, essential vitamins, minerals, and creatine to support rapid weight gain, muscle growth, and strength development.

This premium mass gainer provides over 1,200 calories per serving, making it ideal for bulking phases and intense training programs. The protein blend helps support muscle recovery, while the carbohydrate matrix fuels workouts and replenishes energy levels. Added creatine monohydrate enhances strength and performance, helping you train harder and grow faster.

Optimum Nutrition Serious Mass is perfect for athletes, bodybuilders, and fitness enthusiasts looking for a reliable and effective weight gain supplement in Sri Lanka. It mixes easily, tastes great, and delivers consistent results when combined with proper training and nutrition.

Available at SupplementShop.lk – 100% authentic Optimum Nutrition products with island-wide delivery in Sri Lanka.