Mutant Mass vs Serious Mass: Which Mass Gainer Is Better for Skinny Guys?
If you’re a skinny guy trying to pack on serious size, you’ve likely come across Mutant Mass, Mutant Mass Extreme 2500, and Serious Mass by Optimum Nutrition.
All three are high-calorie weight gainers made for hard-gainers — but which one gives you the most size, strength, and real-world results?
Let’s break it down and find your best match. 👇
💪 What They’re Made For
| Product | Best For |
|---|---|
| Mutant Mass | Regular hard-gainers looking for clean calories and steady muscle gain. |
| Mutant Mass Extreme 2500 | Skinny guys with fast metabolisms who need a calorie bomb to gain size fast. |
| Serious Mass | Beginners or anyone struggling to eat enough — ideal for all-around weight gain and recovery. |
⚡ Quick Breakdown
| Feature | Mutant Mass | Mutant Mass Extreme 2500 | Serious Mass |
|---|---|---|---|
| Calories per Serving | 1,100+ | 1,270 (2,540/day with 2 shakes) | 1,250 |
| Protein | 56g | 46g | 50g |
| Carbs | 192g | 255g | 252g |
| Fat | 8g | 7.5g | 4.5g |
| Size | 6.8kg tub | 5.45kg tub | 5.4kg tub |
| Creatine | ❌ | ❌ | ✅ |
| Multivitamin Blend | ❌ | ❌ | ✅ |
| When to Use | Post-workout / meal | Post-workout + before bed | Post-workout + between meals |
🧠 Which One Builds More Muscle?
Let’s be real — they’ll all help you gain weight. But your choice depends on how hard it is for you to eat and grow.
🥇 Mutant Mass Extreme 2500
The heavyweight king for true hard-gainers.
✔️ For fast metabolisms
✔️ If you can’t eat enough real food
✔️ If you want to bulk aggressively
🥈 Serious Mass
Solid all-rounder.
✔️ Easier on the stomach than Extreme 2500
✔️ Includes creatine + vitamins
✔️ Good for first-timers and lean bulkers
🥉 Mutant Mass
Perfect for lean, controlled gains.
✔️ Highest protein per calorie
✔️ Fewer carbs than the others
✔️ Great for lifters who want quality muscle, not just bulk
🍫 Taste, Flavour & Mixability
All three come in a variety of flavours like Chocolate, Vanilla, Cookies N’ Cream, and Banana.
| Product | Taste & Mixability Notes |
|---|---|
| Mutant Mass | Rich taste, thick texture, mixes well with milk. Great for bulking shakes. |
| Extreme 2500 | Surprisingly easy to drink despite the size — no clumps, no bloating. |
| Serious Mass | Smooth and lighter than others. Slightly sweeter. Easy for beginners. |
✅ Pro Tip: Use whole milk for more calories and a better texture. You can also blend with oats, peanut butter, or banana for a next-level shake.
🥤 How to Use Each One
Mutant Mass
➡️ 1–2 scoops post-workout or as a meal replacement.
Mutant Mass Extreme 2500
➡️ One full shake post-workout + another before bed = over 2,500 calories daily.
Serious Mass
➡️ Take between meals and post-workout. Good morning shake if you’re skipping breakfast.
🥇 Our Verdict: Which One Should You Buy?
| Goal | Pick This One |
|---|---|
| You want a clean bulk with more protein | Mutant Mass |
| You’re eating a lot but still not gaining | Mutant Mass Extreme 2500 |
| You’re a beginner or want creatine + vitamins included | Serious Mass |
| You’re bulking HARD and want big size fast | Extreme 2500 |
| You prefer a lighter shake with easier digestion | Serious Mass |
🔥 Final Thoughts
Whether you go with Mutant Mass, Extreme 2500, or Serious Mass, all three are powerful mass gainers that work — as long as you train hard, sleep well, and hit your calories consistently.
👉 If you’re struggling to eat enough and want extreme results, go with Mutant Mass Extreme 2500.
👉 If you’re after balanced, steady muscle growth, Mutant Mass is a great long-term gainer.
👉 If you want something simple, smooth, and nutrient-rich, Serious Mass is a solid all-round pick.
🔗 Related Links:
✅ Best Mass Gainers for Skinny Guys UK – Complete Guide
✅ Mutant Mass Extreme 2500 Review – Full Breakdown
✅ Serious Mass vs Gold Standard Whey – Which Is Better?
