Thực phẩm bổ sung Optinum Nutrition Serious mass 12lbs – 16 lần dùng

Optimum Nutrition Serious Mass is a high-calorie mass gainer supplement designed for weight gain and muscle building, providing 50g of high-quality protein and over 250g of complex carbohydrates per serving.

• The description claims that Serious Mass provides over 1,250 calories per serving.
• The description claims that Serious Mass contains 50g of protein per serving.
• The description claims that Serious Mass contains over 250g of complex carbohydrates per serving.