Bulk Informed Mass vs Optimum Serious Mass Cookies & Cream
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Bulk Informed Mass and Optimum Serious Mass Cookies & Cream.
Last verified: 01 Mar 2026 · Based on 18 reviews
Our Verdict: Bulk Informed Mass or Optimum Serious Mass Cookies & Cream?
Bulk Informed Mass edges ahead with a higher overall score (77 vs 70) and cleaner ingredients — oat flour over maltodextrin and Informed Sport certification make it the pick for competitive athletes. Optimum Nutrition Serious Mass suits those chasing pure calories on a budget, offering 1,250 kcal per serving at a lower cost-per-kilo with near-universal praise for taste and mixability.
— AIScored Editorial Team
Bulk Informed Mass scores 77.0/100 vs Optimum Serious Mass Cookies & Cream at 70.0/100. Bulk Informed Mass wins on ingredient quality, side effects, certifications. Optimum Serious Mass Cookies & Cream is stronger on effectiveness and value for money.
Bulk Informed Mass vs Optimum Serious Mass Cookies & Cream: What Does the Data Say?
These two mass gainers take noticeably different approaches to the same goal. Bulk's Informed Mass scores 77/100 at £45 for 3kg, using oat flour as its carbohydrate source — a meaningful difference from Optimum Nutrition's Serious Mass (70/100, £58 for 5.4kg), which relies on maltodextrin. That matters if you're sensitive to blood sugar spikes or energy crashes. Bulk also adds HMB (1.5g) alongside 3g creatine monohydrate, giving it more functional ingredients beyond raw calories. Serious Mass counters with a far larger calorie hit — 1,250 kcal and 50g protein per serving compared to Bulk's 550+ kcal and 45g — so it's simply doing more heavy lifting for extreme hard gainers.
If you compete in drug-tested sport, Bulk's Informed Sport certification makes it the only sensible option here. Serious Mass carries no third-party verification whatsoever. Bulk also works out slightly cheaper per kilogram, though that advantage narrows if you're consuming the large Serious Mass servings.
Practically speaking, Serious Mass has earned consistent praise for taste and mixability, while Bulk regularly frustrates users who try to shake it without a blender. If you don't own a blender, that alone might settle the decision.
How Do the Scores Compare?
Informed Mass, Strawberries...
Bulk
|
Serious Mass Cookies & Cream 5.4kg
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 →
Cheapest
|
£65.00 Holland & Barrett → |
| 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 Cookies & Cream 5.4kg
Pros
- ✓Excellent user satisfaction (100% 5-star reviews) with consistent praise for taste and smoothness
- ✓Comprehensive calorie and protein delivery (1,250 kcal + 50g protein) for serious mass gain goals
- ✓Added creatine monohydrate (3g per serving) supports performance and strength gains
- ✓Broad micronutrient fortification including vitamins B-complex, C, E, and minerals for recovery
Cons
- ✗Very high sugar content (12g per serving) and simple carbohydrates (maltodextrin) may cause energy crashes
- ✗Not third-party tested; no NSF Certified for Sport or similar verification
- ✗Multiple allergens (milk, soy, wheat, eggs) limit accessibility; high sodium (1.48g per serving)
- ✗High saturated fat per serving (4g) may be a concern for some cardiovascular profiles
Best For
Score Breakdown: Bulk Informed Mass vs Optimum Serious Mass Cookies & Cream
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 Serious Mass Cookies & Cream? ▼
Is Bulk Informed Mass worth the price compared to Optimum Serious Mass Cookies & Cream? ▼
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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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