Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) vs Serious Mass Banana 2.73kg

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) and Serious Mass Banana 2.73kg.

Last verified: 07 Apr 2026 · Based on 8 reviews

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80.0

Quick Answer

Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) scores 80.0/100 vs Serious Mass Banana 2.73kg at 70.0/100. Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) wins on effectiveness, ingredient quality, side effects.

Which is better: Critical Mass Professional ... or Serious Mass Banana 2.73kg?

Applied Nutrition Critical Mass wins with an 80/100 score versus Optimum Nutrition's 70/100, backed by superior ingredient quality and faster reported results. Choose Serious Mass if you need maximum calories per serving — its 1,250 kcal dwarfs Critical Mass — but be mindful of the higher sugar content.

— AIScored Editorial Team

How Do the Scores Compare?

Critical Mass Professional ...

Serious Mass Banana 2.73kg

	Critical Mass Professional ... Applied Nutrition	Serious Mass Banana 2.73kg Optimum Nutrition
Overall Score	80.0	70.0
Effectiveness	90.0/100 Best	80.0/100
Ingredient Quality	80.0/100 Best	70.0/100
Value for Money	80.0/100 Best	80.0/100 Best
Side Effects	80.0/100 Best	70.0/100
Certifications	80.0/100 Best	30.0/100
Best Price	£40.00 Holland & Barrett → Cheapest	£40.00 Holland & Barrett → Cheapest
Form	None	powder
Dose	None	None
Third-Party Tested	✗ No	✗ No
Reviews Analysed	4	4

Critical Mass Professional Lean ...

Pros

✓Rapid results: Users report visible muscle gain and strength increases within 2-4 weeks
✓Strong, enjoyable flavor that encourages consistent use
✓High caloric density (1,000+ calories) supports the caloric surplus needed for lean mass gain
✓Informed Sport registered and Halal certified—meets testing and dietary standards

Cons

✗Very high calorie content may lead to excess fat gain if training stimulus is insufficient
✗Strong flavor (per reviews) may be overwhelming for some users even at reduced portions
✗Not third-party tested beyond Informed Sport registration; lacks independent lab verification
✗High sugar content in standard formulation (though 'reduced sugar' variant exists); not suitable for strict carb-controlled diets

Best For

Hard gainers and ectomorphs seeking rapid lean mass and strength Athletes in high-volume training phases requiring caloric surplus Individuals prioritizing convenience and taste over minimal processing Users following halal dietary requirements

Holland & Barrett £40.00

View full review →

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

Hard-gainers seeking rapid calorie and protein intake Athletes with high metabolic demands Individuals needing convenient meal replacement Older adults (71+ demonstrated long-term use satisfaction) Those prioritizing taste and palatability

Holland & Barrett £40.00

View full review →

What does the data say about Critical Mass Professi... vs Serious Mass Banana 2.73kg?

Both products sit at £40, but Applied Nutrition's Critical Mass edges ahead with a score of 80/100 compared to Optimum Nutrition's Serious Mass at 70/100 — and the gap is most notable in effectiveness (90 versus 80) and ingredient quality (80 versus 70). The Critical Mass delivers over 1,000 calories per serving and users report visible strength and size gains within two to four weeks, suggesting the formula is well-calibrated for lean mass rather than indiscriminate bulk. Serious Mass hits 1,250 calories per serving, which is more aggressive, but also comes with 12g of sugar per serving — something worth factoring in if you're mindful of overall diet quality.

If you train hard and consistently, Applied Nutrition is the better pick. The higher effectiveness score reflects real-world results, and the leaner calorie profile means less risk of unwanted fat if your sessions are intense. Serious Mass suits someone who genuinely struggles to eat enough and needs every calorie they can get — the extra 250 calories per serving adds up meaningfully over time.

On taste, both are banana flavoured and both receive strong feedback in that regard. Applied Nutrition comes in at 2.4kg versus Serious Mass at 2.73kg for the same price, so you get slightly fewer servings — but given the scores, the quality difference likely justifies that.

Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) Winner 80.0/100

Applied Nutrition Critical Mass Professional is a high-calorie lean mass gainer (1,000+ calories per serving) designed for hard gainers and athletes seeking rapid weight gain.

Effectiveness

Critical Mass Pr..

90.0/100

Serious Mass Ban..

80.0/100

Ingredient Quality

Critical Mass Pr..

80.0/100

Serious Mass Ban..

70.0/100

Value for Money

Critical Mass Pr..

80.0/100

Serious Mass Ban..

80.0/100

Side Effects

Critical Mass Pr..

80.0/100

Serious Mass Ban..

70.0/100

Certifications

Critical Mass Pr..

80.0/100

Serious Mass Ban..

30.0/100

What are the key differences?

Critical Mass Professio.. is best for: Hard gainers and ectomorphs seeking rapid lean mass and strength, Athletes in high-volume training phases requiring caloric surplus

Serious Mass Banana 2.73kg is best for: Hard-gainers seeking rapid calorie and protein intake, Athletes with high metabolic demands

Frequently Asked Questions

Which is better, Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) or Serious Mass Banana 2.73kg? ▼

Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) scores 80.0/100 overall while Serious Mass Banana 2.73kg scores 70.0/100. Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) comes out ahead, scoring higher on effectiveness (90.0 vs 80.0). Critical Mass Professional Lea is best suited for Hard gainers and ectomorphs seeking rapid lean mass and strength and Athletes in high-volume training phases requiring caloric surplus. Serious Mass Banana 2.73kg is better for Hard-gainers seeking rapid calorie and protein intake and Athletes with high metabolic demands.

Is Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) worth the price compared to Serious Mass Banana 2.73kg? ▼

Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) costs £40.00 while Serious Mass Banana 2.73kg is £40.00. For value, Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) scores 80.0/100 vs Serious Mass Banana 2.73kg's 80.0/100. Both offer similar value for money.

Which has fewer side effects? ▼

Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings) scores 80.0/100 for side effects (higher means fewer reported issues) while Serious Mass Banana 2.73kg scores 70.0/100. Reviewers report fewer side effects with Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings). For certification and testing, Critical Mass Profes scores 80.0/100 vs Serious Mass Banana 's 30.0/100. Always consult a healthcare professional before starting any supplement.