Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer vs Serious Mass Banana 2.73kg
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer and Serious Mass Banana 2.73kg.
Last verified: 07 Apr 2026 · Based on 18 reviews
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer scores 72.0/100 vs Serious Mass Banana 2.73kg at 70.0/100. Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer wins on certifications. Serious Mass Banana 2.73kg is stronger on ingredient quality and value for money.
Which is better: Optimum Nutrition Serious M... or Serious Mass Banana 2.73kg?
The Banana 2.73kg edges ahead on value (80 vs 72) and costs £12.95 less, making it the better buy for budget-conscious hard-gainers. However, if batch consistency and long-term brand trust matter more than price, the original Serious Mass — with its proven track record across years of loyal use — is worth the premium.
— AIScored Editorial Team
How Do the Scores Compare?
Optimum Nutrition Serious M...
Optimum Nutrition
|
Serious Mass Banana 2.73kg
Optimum Nutrition
|
|
|---|---|---|
| Overall Score | 72.0 | 70.0 |
| Effectiveness |
80.0/100
Best
|
80.0/100
Best
|
| Ingredient Quality | 68.0/100 |
70.0/100
Best
|
| Value for Money | 72.0/100 |
80.0/100
Best
|
| Side Effects | 58.0/100 |
70.0/100
Best
|
| Certifications |
70.0/100
Best
|
30.0/100 |
| Best Price | £52.95 Amazon UK → |
£40.00
Holland & Barrett →
Cheapest
|
| Form | N/A | powder |
| Dose | N/A | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 14 | 4 |
Optimum Nutrition Serious Mass P...
Pros
- ✓Highly effective for calorie surplus and weight gain, with multiple reviewers reporting measurable mass gains (e.g. 2 stone in 3 months with training)
- ✓Strong long-term loyalty — several reviewers report 5–10+ years of consistent use
- ✓Good flavour profile (strawberry and banana rated as milkshake-like)
- ✓Excellent calorie density (1,250 kcal/serving) makes it practical for those who struggle to eat enough food
Cons
- ✗Inconsistent quality between batches — at least one reviewer reported a virtually flavourless delivery
- ✗Mixing challenges: oversized scoop won't fit most shaker bottles, and blender is often needed to avoid clumping
- ✗Digestive discomfort (bloating, gas, heaviness) reported by multiple users — typical of high-maltodextrin mass gainers
- ✗Premium price point relative to own-brand alternatives, though most reviewers consider it justified
Best For
Serious Mass Banana 2.73kg
Pros
- ✓Excellent taste (specifically noted as 'tasty' and 'marvellous')
- ✓High calorie density (1,250 kcal per serving) efficiently supports weight gain goals
- ✓Substantial protein content (50g per serving) supports muscle building and repair
- ✓Good value for money at current pricing
Cons
- ✗Very high sugar content (12g per serving) may be concerning for some users
- ✗Not third-party tested or certified
- ✗High sodium per serving (1.48g salt) may be problematic for sodium-sensitive individuals
- ✗Contains multiple allergens (milk, soy, gluten possible) limiting suitability for those with common allergies
Best For
What does the data say about Optimum Nutrition Seri... vs Serious Mass Banana 2.73kg?
Both products come from the same brand and share identical effectiveness scores (80/100), so the differences come down to price, value, and practical details. The larger multi-flavour version at £52.95 scores 72/100 overall, while the 2.73kg banana-only option at £40.00 scores 70/100 — close enough that price becomes the deciding factor for most buyers. The banana variant edges ahead on value (80 vs 72), which makes sense given the lower price point and similar calorie and protein delivery.
If you're new to mass gainers or unsure which flavour you'll stick with long-term, the £52.95 version gives you options. Reviewers particularly rate strawberry and banana, and the loyalty data — some buyers using it for a decade — suggests it works. The banana-specific tub at £40 suits anyone who already knows they like the flavour and wants to spend less per kilo.
Practically, both require a blender rather than a standard shaker due to the thick consistency and oversized scoops. The banana variant's 12g of sugar per serving is worth noting if you're watching intake.
Optimum Nutrition Serious Mass is one of the market's most established mass gainers, delivering approximately 1,250 calories and 50g protein per two-scoop serving alongside creatine, glutamine, and a full vitamin/mineral blend.
What are the key differences?
Frequently Asked Questions
Which is better, Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer or Serious Mass Banana 2.73kg? ▼
Is Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer worth the price compared to Serious Mass Banana 2.73kg? ▼
Which has fewer side effects? ▼
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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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