Product Description
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Optimum Nutrition Serious Mass 2.73kg is a high-calorie mass gainer designed to support weight gain and muscle growth for individuals with fast metabolisms, intense training schedules, or increased caloric needs. Each serving delivers over 1,250 calories when mixed with water, and even more when blended with milk or additional ingredients.
Formulated with a protein blend of whey protein concentrate, calcium caseinate, and egg whites, Serious Mass supplies 50g of protein per serving, alongside over 250g of carbohydrates and added creatine, glutamine, and 25+ essential vitamins and minerals.
This gainer is ideal for hard gainers or athletes undergoing bulking phases. It’s easy to mix, available in multiple flavours, and can be used between meals or post-workout to boost calorie intake and help meet macronutrient goals.
Manufactured by Optimum Nutrition, a global leader in sports nutrition, Serious Mass is trusted by bodybuilders and performance athletes worldwide.
