Bulk Informed Mass vs Optimum Nutrition Serious Mass Banana
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Bulk Informed Mass and Optimum Nutrition Serious Mass Banana.
Last verified: 01 Mar 2026 · Based on 18 reviews
Our Verdict: Bulk Informed Mass or Optimum Nutrition Serious Mass Banana?
Bulk Informed Mass edges ahead with a higher score (77 vs 70) and better ingredient quality (83 vs 70), thanks to oat-based carbs, added creatine, and Informed Sport certification. The extra £5 is worth it for competitive athletes who need a certified, cleaner formula. Choose Optimum Nutrition Serious Mass if you want straightforward calorie density on a tighter budget and don't mind the higher sugar content.
— AIScored Editorial Team
Bulk Informed Mass scores 77.0/100 vs Optimum Nutrition Serious Mass Banana at 70.0/100. Bulk Informed Mass wins on ingredient quality, side effects, certifications. Optimum Nutrition Serious Mass Banana is stronger on effectiveness and value for money.
Bulk Informed Mass vs Optimum Nutrition Serious Mass Banana: What Does the Data Say?
Informed Mass scores higher on ingredient quality (83.0 vs 70.0) because it uses oat flour instead of maltodextrin for carbs, creating slower energy release. Each 45g serving delivers over 550 kcal, while Serious Mass packs 1,250 kcal per serving — more than double the density. Informed Mass also includes 3g creatine monohydrate and 1.5g HMB, useful compounds for muscle building. Serious Mass takes a simpler approach: just calories and protein (50g).
Informed Mass (£45) suits serious trainers wanting cleaner carbohydrates and additional muscle-building compounds beyond basic protein. You'll need a blender though — multiple reviewers reported shaker mixing fails. Serious Mass (£40) wins on price and sheer convenience for hard-gainers who just need calorie targets hit.
Serious Mass tastes excellent, with banana flavour specifically praised as 'tasty' and 'marvellous'. Informed Mass has a thick, heavy texture that polarises some users. Serious Mass does contain 12g sugar per serving, worth noting if you're watching intake. Neither product carries third-party testing or certification.
How Do the Scores Compare?
Informed Mass, Strawberries...
Bulk
|
Serious Mass Banana 2.73kg
Optimum Nutrition
|
|
|---|---|---|
| Overall Score | 77.0 | 70.0 |
| Effectiveness | 72.0/100 |
80.0/100
Best
|
| Ingredient Quality |
83.0/100
Best
|
70.0/100 |
| Value for Money | 76.0/100 |
80.0/100
Best
|
| Side Effects |
78.0/100
Best
|
70.0/100 |
| Certifications |
85.0/100
Best
|
30.0/100 |
| Best Price | £45.00 Amazon UK → |
£36.00
Holland & Barrett →
Cheapest
|
| Price per Serving | £2.25 20 servings | N/A |
| Form | Powder | powder |
| Dose | 45g protein, 550+ kcal per serving | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 14 | 4 |
Informed Mass, Strawberries and ...
Pros
- ✓No maltodextrin — oat flour provides complex carbs with a lower glycaemic impact, widely praised by reviewers
- ✓Informed Sport certified, providing reliable banned-substance assurance for competitive athletes
- ✓Added creatine monohydrate (3g) and HMB (1.5g) add meaningful ergogenic value beyond a standard gainer
- ✓Generally well-tolerated, with DigeZyme enzyme blend supporting digestion of the large serving size
Cons
- ✗Mixes poorly in a shaker without a blender — clumping and undissolved particles reported by multiple reviewers
- ✗Thick, heavy texture is polarising; some users found it unpleasant to drink
- ✗Only 20 servings per 3kg bag — serving size (150g) is large and the bag depletes quickly
- ✗Taste described as average to decent across flavours; some find it overly saline or requiring large water volume
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: Bulk Informed Mass vs Optimum Nutrition Serious Mass Banana
Bulk's Informed Mass is a premium lean mass gainer built around a tri-protein blend (whey concentrate, isolate, and casein) delivering 45g protein and 550+ kcal per serving from oat flour rather than maltodextrin — a distinction repeatedly praised by reviewers.
What are the key differences?
Frequently Asked Questions
Which is better, Bulk Informed Mass or Optimum Nutrition Serious Mass Banana? ▼
Is Bulk Informed Mass 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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