If you struggle to gain weight or build size, this formula is designed to help you move the scale in the right direction. Optimum Nutrition created Serious Mass for people with fast metabolisms or naturally slim bodies who need extra calories to grow. The world’s #1 mass gainer for serious weight and muscle gain. See it for yourself on Google.

Each serving delivers a powerful blend of calories, protein, and carbohydrates to support steady weight gain and muscle growth. It also includes creatine and essential nutrients that help fuel workouts and support recovery after training.

Serious Mass is a simple way to increase your daily calorie intake without forcing down large meals. Mix it with milk or water and use it after workouts or between meals to help your body stay in a calorie surplus.

serious mass 3 kg box 

Key Highlights :

• High-calorie formula designed for healthy weight gain

• Rich in protein to support muscle growth

• High in carbohydrates to fuel training and recovery

• Includes creatine and essential nutrients

• Ideal for slim or hard-gainer body types

• Designed for consistent, natural mass gain when used with proper training and diet

This supplement works best when combined with regular strength training, proper meals, and enough rest.