Critical Mass Vanilla vs Optimum Nutrition Serious Mass Banana
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Critical Mass Vanilla and Optimum Nutrition Serious Mass Banana.
Last verified: 01 Mar 2026 · Based on 15 reviews
Our Verdict: Critical Mass Vanilla or Optimum Nutrition Serious Mass Banana?
Applied Nutrition Critical Mass edges ahead with a slightly higher overall score (71 vs 70) and superior ingredient quality from its 95% Whey Isolate base, creatine, HMB, and leucine stack. Optimum Nutrition Serious Mass suits budget-conscious buyers who prioritise taste and proven effectiveness, offering 1,250kcal per serving at £40 versus £62.76.
— AIScored Editorial Team
Critical Mass Vanilla scores 71.0/100 vs Optimum Nutrition Serious Mass Banana at 70.0/100. Critical Mass Vanilla wins on certifications. Optimum Nutrition Serious Mass Banana is stronger on effectiveness and value for money.
Critical Mass Vanilla vs Optimum Nutrition Serious Mass Banana: What Does the Data Say?
Both products sit within a point of each other overall — Applied Nutrition's Critical Mass at 71/100 for £62.76 versus Optimum Nutrition's Serious Mass at 70/100 for £40.00 — but they differ meaningfully in what you get per serving. Critical Mass uses ISO-XP Whey Protein Isolate, a higher-purity protein form, and adds creatine monohydrate, HMB, leucine, and glutamine — ingredients with genuine research backing for muscle retention and recovery. Serious Mass keeps things simpler: 1,250 kcal and 50g protein per serving, with no performance extras, but scores higher on effectiveness (80/100 versus 73/100) and value (80/100 versus 76/100), suggesting users find it reliably delivers on its core promise.
If you want a straightforward, affordable calorie dump — particularly useful if you're a hard gainer who just needs more food — Serious Mass does the job cleanly. Critical Mass suits someone who wants the added performance ingredients alongside their calories and doesn't mind paying more for a larger supply.
Practically, Critical Mass reportedly clumps without a blender, and some users flag inconsistent flavour across batches. Serious Mass carries 12g of sugar per serving, which is worth noting if you're watching intake.
How Do the Scores Compare?
Critical Mass Professional ...
Applied Nutrition
|
Serious Mass Banana 2.73kg
Optimum Nutrition
|
|
|---|---|---|
| Overall Score | 71.0 | 70.0 |
| Effectiveness | 73.0/100 |
80.0/100
Best
|
| Ingredient Quality |
70.0/100
Best
|
70.0/100
Best
|
| Value for Money | 76.0/100 |
80.0/100
Best
|
| Side Effects | 62.0/100 |
70.0/100
Best
|
| Certifications |
72.0/100
Best
|
30.0/100 |
| Best Price | £62.76 Amazon UK → |
£36.00
Holland & Barrett →
Cheapest
|
| Form | Powder | powder |
| Dose | None | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 11 | 4 |
Critical Mass Professional Lean ...
Pros
- ✓Over 1,000 calories per serving — highly efficient caloric surplus for hard gainers
- ✓Premium protein source: ISO-XP 95% Whey Protein Isolate at 42g per serving
- ✓Evidence-based performance additions: creatine monohydrate, HMB, leucine, and glutamine
- ✓Reduced-sugar formulation compared to conventional mass gainers
Cons
- ✗Batch-to-batch flavour inconsistency reported — some users find later purchases taste synthetic or chemical
- ✗Large 150g serving size can clump without a blender; shaker alone may not suffice
- ✗Contains milk, soy, and wheat — unsuitable for those with common allergens
- ✗Very high caloric density requires careful tracking to avoid unwanted fat gain
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
Score Breakdown: Critical Mass Vanilla vs Optimum Nutrition Serious Mass Banana
Applied Nutrition Critical Mass Professional is a high-calorie lean mass gainer delivering over 1,000 calories and 42g of protein per 150g serving, built around ISO-XP 95% Whey Protein Isolate with added creatine, HMB, leucine, glutamine, CLA, and MCT powder.
What are the key differences?
Frequently Asked Questions
Which is better, Critical Mass Vanilla or Optimum Nutrition Serious Mass Banana? ▼
Is Critical Mass Vanilla worth the price compared to Optimum Nutrition Serious Mass Banana? ▼
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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