Optimum Nutrition Serious Mass 2.7kg

High-Calorie Mass Gainer for Weight Gain & Muscle Growth

Serious Mass is a high-calorie weight gainer designed for people who struggle to eat enough food to gain weight and build muscle. Each serving delivers a powerful combination of calories, protein, carbohydrates, vitamins, and minerals, making it one of the most popular mass gainers for hard gainers, skinny guys, bodybuilders, and athletes.

If you have a fast metabolism, poor appetite, or simply can’t maintain a calorie surplus through food alone, Serious Mass provides a simple, convenient solution to increase daily calorie intake and support consistent weight gain.

With a smooth texture and great taste, Serious Mass mixes easily and fits seamlessly into any bulking routine — whether used post-workout, between meals, or before bed.

Why Choose Serious Mass?

Successful weight gain requires a sustained calorie surplus, and this is where many people fail. Serious Mass is specifically formulated to help bridge that gap by delivering a dense, balanced source of calories and macronutrients in one easy shake.

Serious Mass supports:

• Healthy weight gain

• Increased muscle mass

• Improved recovery from intense training

• Consistent daily calorie intake

The carefully balanced blend of protein and carbohydrates helps fuel workouts while supporting muscle repair and growth — making Serious Mass ideal for long-term bulking and size gains.

Who Is Serious Mass Best For?

✔ Skinny guys struggling to gain weight
✔ Hard gainers with fast metabolisms
✔ Bodybuilders in a bulking phase
✔ Athletes needing extra daily calories
✔ Anyone who can’t eat enough food to grow

Serious Mass is built for people who genuinely struggle to gain size, not those looking for a light meal replacement.

How to Take Serious Mass for Best Results

To maximise weight gain and muscle growth, consistency is key.

Recommended use:

• Mix 1 serving with water or milk

• Take post-workout to support recovery and growth

• Or use between meals to increase daily calorie intake

For beginners or those with smaller appetites, start with ½ serving and gradually increase as tolerance improves.

Serious Mass can also be blended with ingredients such as oats, peanut butter, bananas, or full-fat milk to further increase calorie intake if needed.

How Serious Mass Fits Into a Bulking Plan

Serious Mass works best when combined with:

• Progressive strength training

• Adequate protein intake

• A consistent calorie surplus

Used daily, it helps remove the biggest obstacle for hard gainers — not eating enough calories to grow.

Learn More About Weight Gain & Muscle Building

If you want to maximise results from Serious Mass, these expert guides can help:

• Best Mass Gainers in the UK – in-depth comparison of top weight gain supplements

• How to Build Muscle for Skinny Guys – proven training, diet, and supplement strategies

• Beginner Workout Plan for Muscle Growth – simple routines that pair perfectly with mass gainers

(All guides are written from real-world training experience and supplement testing.)

Serious Mass 2.7kg is a proven, high-calorie mass gainer trusted worldwide by hard gainers and athletes who need real nutritional support to gain size and strength.