Optimum Nutrition Serious Mass vs Optimum Serious Mass Cookies & Cream
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Optimum Nutrition Serious Mass and Optimum Serious Mass Cookies & Cream.
Last verified: 01 Mar 2026 · Based on 18 reviews
Our Verdict: Optimum Nutrition Serious Mass or Optimum Serious Mass Cookies & Cream?
Optimum Nutrition Serious Mass edges ahead at 72/100 thanks to stronger long-term loyalty and ingredient quality, though the Cookies & Cream variant offers better value at £40 versus £53. Choose Cookies & Cream if budget matters and you prefer a tastier, lower-cost option with identical effectiveness scores.
— AIScored Editorial Team
Optimum Nutrition Serious Mass scores 72.0/100 vs Optimum Serious Mass Cookies & Cream at 70.0/100. Optimum Nutrition Serious Mass wins on certifications. Optimum Serious Mass Cookies & Cream is stronger on ingredient quality and value for money.
Optimum Nutrition Serious Mass vs Optimum Serious Mass Cookies & Cream: What Does the Data Say?
Both products are from Optimum Nutrition and share the same effectiveness score of 80/100, so the real differences come down to price, value, and formulation specifics. The original Serious Mass (£52.95, score 72/100) comes in a larger format but has faced batch consistency complaints and requires a blender due to its oversized scoop. The Cookies & Cream variant (£40.00, score 70/100) scores higher on value at 80/100 versus 72/100, delivers 1,250 kcal and 50g protein per serving, and reviewers consistently praise its taste and mixability — two areas where the original has occasionally fallen short.
If you're a committed hard gainer who's been using the original for years and trust the formula, stick with it — the long-term loyalty it inspires is genuine. But for someone new to mass gainers or working to a tighter budget, the Cookies & Cream version offers better value and fewer practical headaches.
One caution worth noting: the 250g carbohydrate and 12g sugar per serving in the Cookies & Cream variant can cause digestive discomfort for some people.
How Do the Scores Compare?
Optimum Nutrition Serious M...
Optimum Nutrition
|
Serious Mass Cookies & Cream 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 |
£59.99
£58.00
Amazon UK →
-3% deal
|
£36.00
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 Cookies & Cream 2.73kg
Pros
- ✓Excellent taste and mixability (mentioned in 3 of 4 reviews)
- ✓High calorie density (1,250 kcal per serving) supports rapid weight gain for hardgainers
- ✓50g protein per serving aids muscle protein synthesis and recovery
- ✓Added 3g creatine monohydrate per serving (evidence-based for strength and muscle gains)
Cons
- ✗Extremely high sugar content (12g per serving) and 250g carbs may cause energy crashes or GI distress in sensitive individuals
- ✗Not third-party tested or certified (no NSF, Informed-Sport, or banned substance screening listed)
- ✗Contains common allergens (milk, soy, wheat, gluten) limiting accessibility
- ✗Very high serving size (336g per scoop) makes convenient dosing impractical; typically mixed with large volumes of liquid
Best For
Score Breakdown: Optimum Nutrition Serious Mass vs Optimum Serious Mass Cookies & Cream
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 or Optimum Serious Mass Cookies & Cream? ▼
Is Optimum Nutrition Serious Mass worth the price compared to Optimum Serious Mass Cookies & Cream? ▼
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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