ON Serious Mass 5.45kg

Product Overview: Optimum Nutrition Serious Mass in 16 servings

Optimum Nutrition pitch this formula as an ultra‑high‑calorie shake ideal for individuals who find it challenging to consume enough calories through food alone—such as hard gainers or those with fast metabolisms 

Key Benefits

• Up to 1,260 calories per serving when mixed with water—or even more when blended with milk—to support significant calorie surplus needs 

• 50 grams of fast‑digesting protein (primarily whey protein concentrate) to support muscle recovery and growth 

• 250‑plus grams of carbohydrates to replenish glycogen stores and fuel intense workouts; these carbs have no added sugar 

• 5 grams of creatine monohydrate per serving to boost strength, power, and performance

• 8 grams of naturally occurring glutamine, along with 11 grams of BCAAs and 24 grams of essential amino acids, supporting muscle recovery and synthesis 

• 19–25 added vitamins and minerals, including vitamins A, C, E, B-vitamins, zinc, and others to support immune function and metabolism.

Usage Instructions

• Serving size: 2 heaping scoops (~334 g), blended with 710 ml of water or milk for best taste and consistency 

• Timing: Ideal for post-workout recovery, between meals, or even before bed to maintain a positive calorie balance

• For beginners: Start with half a serving and gradually increase to a full serving over the week 

Summary Table