Optimum Nutrition Serious Mass-16Serv.-5.4KG- Exp 11/2026

Serious Mass for Serious Calories!

Gain Weight and Muscles Now with Serious Mass Suitable for: 

• Who needs extra calories.

• Who looks forward to being bigger.

• A highly-active metabolism.

• A weaker appetite.

Into every Serving: 

• 1258 calories.

• 50 grams of protein.

• 255 grams of carbohydrates.

• 23 Vitamins and Minerals.

• 3 gram of creatine.

• 1 gram of glutamine.

Supplement Facts: