Description
Optimum Nutrition Serious Mass – High-Calorie Weight Gainer
Take your bulking to the next level with Optimum Nutrition Serious Mass — one of the most popular and proven mass gainers designed to help you build size, strength, and overall body weight.
Built for hard gainers and athletes who struggle to hit their calorie targets, Serious Mass delivers a powerful combination of calories, protein, carbohydrates, and added performance ingredients in one convenient shake.
Serious Size Starts Here
Gaining weight requires a calorie surplus — and for many, eating enough food alone can be a challenge. Serious Mass makes it easier by packing over 1,200 calories per serving, helping you increase daily intake without constantly eating.
Key Benefits
-
High-Calorie Formula for Weight Gain
Delivers approximately 1,250 calories per serving, ideal for bulking phases and hard gainers. -
50g Protein for Muscle Growth
Supports muscle repair and growth with a blend of quality proteins. -
High Carbohydrate Content for Energy
Over 250g of carbs per serve helps fuel workouts and replenish glycogen stores. -
Added Creatine for Strength & Size
Includes creatine monohydrate to support power, performance, and muscle gains. -
Vitamins, Minerals & Glutamine
Fortified with over 20 micronutrients to support overall health and recovery.
Built for Serious Results
Serious Mass is designed for those who:
- Struggle to gain weight or size
- Have fast metabolisms
- Need extra calories to support intense training
- Want a convenient way to increase daily intake
Whether used post-workout or between meals, it’s an easy way to stay in a calorie surplus and support consistent growth.
How to Use
Mix 2 scoops with water or milk for a full serving, or start with half a serving if you’re new. You can also blend it with foods like oats, peanut butter, or fruit to increase calories even further.
Bulk Up the Smart Way
If you’re serious about gaining size, strength, and muscle, Optimum Nutrition Serious Mass gives you the calories and nutrients needed to grow — without the hassle of constant eating.
