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Optimum Nutrition Marshmallow Crunch Bar vs Optimum Nutrition Chocolate Brownie Bar

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Optimum Nutrition Marshmallow Crunch Bar and Optimum Nutrition Chocolate Brownie Bar.

Last verified: 01 Mar 2026 · Based on 15 reviews

80.0
Score Summary

Optimum Nutrition Marshmallow Crunch Bar scores 80.0/100 vs Optimum Nutrition Chocolate Brownie Bar at 40.0/100. Optimum Nutrition Marshmallow Crunch Bar wins on effectiveness, ingredient quality, value for money.

How Do the Scores Compare?

Marshmallow Crunch Protein Bar 65g
Chocolate Brownie Crunch Pr...
Marshmallow Crunch Protein Bar 65g
Marshmallow Crunch Protein Bar 65g
Optimum Nutrition
Chocolate Brownie Crunch Protein Bar 65g
Chocolate Brownie Crunch Pr...
Optimum Nutrition
Overall Score 80.0 40.0
Effectiveness 80.0/100
Best
57.0/100
Ingredient Quality 70.0/100
Best
38.0/100
Value for Money 80.0/100
Best
44.0/100
Side Effects 80.0/100
Best
32.0/100
Certifications 30.0/100
Best
22.0/100
Best Price £2.20 Amazon UK →
Cheapest
£2.75 Holland & Barrett →
Form Bar Bar
Dose None None
Third-Party Tested ✗ No ✗ No
Reviews Analysed 4 11

Marshmallow Crunch Protein Bar 65g

Pros

  • Excellent taste and texture - all reviewers specifically commended flavor profile
  • High protein content (20g) with no added sugar, supporting muscle support goals
  • Competitively priced compared to other premium protein bar brands
  • Vegetarian-friendly formula

Cons

  • Contains multiple major allergens (gluten, milk, eggs, nuts, soy, peanuts) - unsuitable for those with allergies or severe intolerances
  • Not third-party tested - no independent verification of nutrient claims or purity
  • Not vegan - contains animal-derived ingredients, limiting accessibility
  • Contains naturally occurring sugars despite 'no added sugar' marketing - total sugar content not disclosed in reviews

Best For

Gym enthusiasts and athletes seeking post-workout snacks People wanting high-protein convenience foods with good taste Those following low-added-sugar diets Vegetarians
View full review →

Chocolate Brownie Crunch Protein Bar 65g

Pros

  • Delivers a solid 20g of protein per bar — well-suited to post-workout or high-protein snacking goals
  • No added sugar, making it compatible with low-sugar dietary targets
  • From a globally recognised and long-established sports nutrition brand
  • Suitable for vegetarians

Cons

  • Texture widely criticised as dry, hard, and chalky — a polarising issue across reviews
  • Artificial sweetener aftertaste reported as overpowering by several buyers
  • Sugar alcohols caused immediate and severe digestive distress in at least one reviewer
  • Contains seed oils and multiple common allergens (milk, soy, wheat, oat); allergen labelling flagged as inadequate by one reviewer

Best For

Gym-goers tracking daily protein intake Busy individuals needing a portable high-protein snack Those comfortable with sugar-free sweeteners and no digestive sensitivity to sugar alcohols
View full review →

Score Breakdown: Optimum Nutrition Marshmallow Crunch Bar vs Optimum Nutrition Chocolate Brownie Bar

Optimum Nutrition Marshmallow Crunch Bar Winner 80.0/100

Optimum Nutrition's Marshmallow Crunch Protein Bar is a 20g protein bar with white chocolate and marshmallow flavour, receiving unanimous 5-star ratings from all 4 Holland & Barrett reviewers.

Effectiveness
Marshmallow Crun..
80.0/100
Chocolate Browni..
57.0/100
Ingredient Quality
Marshmallow Crun..
70.0/100
Chocolate Browni..
38.0/100
Value for Money
Marshmallow Crun..
80.0/100
Chocolate Browni..
44.0/100
Side Effects
Marshmallow Crun..
80.0/100
Chocolate Browni..
32.0/100
Certifications
Marshmallow Crun..
30.0/100
Chocolate Browni..
22.0/100

What are the key differences?

Optimum Nutrition Marshmallow Crunch Bar is best for: Gym enthusiasts and athletes seeking post-workout snacks, People wanting high-protein convenience foods with good taste
Optimum Nutrition Chocolate Brownie Bar is best for: Gym-goers tracking daily protein intake, Busy individuals needing a portable high-protein snack

Frequently Asked Questions

Which is better, Optimum Nutrition Marshmallow Crunch Bar or Optimum Nutrition Chocolate Brownie Bar?
Optimum Nutrition Marshmallow Crunch Bar scores 80.0/100 overall while Optimum Nutrition Chocolate Brownie Bar scores 40.0/100. Optimum Nutrition Marshmallow Crunch Bar comes out ahead, scoring higher on effectiveness (80.0 vs 57.0). Optimum Nutrition Marshmallow Crunch Bar is best suited for Gym enthusiasts and athletes seeking post-workout snacks and People wanting high-protein convenience foods with good taste. Optimum Nutrition Chocolate Brownie Bar is better for Gym-goers tracking daily protein intake and Busy individuals needing a portable high-protein snack.
Is Optimum Nutrition Marshmallow Crunch Bar worth the price compared to Optimum Nutrition Chocolate Brownie Bar?
Optimum Nutrition Marshmallow Crunch Bar costs £2.20 while Optimum Nutrition Chocolate Brownie Bar is £2.75. For value, Optimum Nutrition Marshmallow Crunch Bar scores 80.0/100 vs Optimum Nutrition Chocolate Brownie Bar's 44.0/100. Optimum Nutrition Marshmallow Crunch Bar delivers better value relative to its quality.
Which has fewer side effects?
Optimum Nutrition Marshmallow Crunch Bar scores 80.0/100 for side effects (higher means fewer reported issues) while Optimum Nutrition Chocolate Brownie Bar scores 32.0/100. Reviewers report fewer side effects with Optimum Nutrition Marshmallow Crunch Bar. For certification and testing, Optimum Nutrition Marshmallow Crunch Bar scores 30.0/100 vs Optimum Nutrition Chocolate Brownie Bar's 22.0/100. Always consult a healthcare professional before starting any supplement.

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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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