Optimum Nutrition Serious Mass.- 2.73KG

Serious Mass by Optimum Nutrition is a high-calorie weight-gaining powder designed for lifters, athletes and anyone with fast metabolism struggling to consume enough calories. With over 1,200 kcal, 50 g protein and 250+ g carbs per serving, this formula also delivers vitamins, minerals and added creatine to support muscle growth and recovery. Ideal for post-workout, between meals or any time you need to up your calorie intake.

• Mix ~2 heaping scoops (size may vary by region) with ~710 ml (24 oz) of water or milk. 

• Use it post workout, between meals or when you need extra calories. 

• Note: Beginners may start with half a serving initially