Bulk Creatine Monohydrate (Creapure) 500g vs Optimum Nutrition Micronized Creatine Powder 317g

Q: Which is better, Bulk Creatine Monohydrate (Creapure) 500g or Optimum Nutrition Micronized Creatine Powder 317g?

Bulk Creatine Monohydrate (Creapure) 500g scores 91.0/100 while Optimum Nutrition Micronized Creatine Powder 317g scores 79.0/100 in our analysis. Bulk Creatine Monohydrate (Creapure) 500g is the higher-rated product overall.

Q: Is Bulk Creatine Monohydrate (Creapure) 500g worth the price compared to Optimum Nutrition Micronized Creatine Powder 317g?

Bulk Creatine Monohydrate (Creapure) 500g scores 91.0/100 for value, while Optimum Nutrition Micronized Creatine Powder 317g scores 68.0/100. Check our price comparison above for the latest UK prices.

Q: Why do 87% of UK creatine products lack third-party certification?

Of 31 creatine products in our database, only 4 carry independent third-party certification (Creapure, Informed Sport, Informed Choice, or NSF Certified for Sport). The certified products score 77.2/100 on average versus 67.5 for uncertified ones, a 9.7-point gap. The top-scoring creatine overall, Bulk Creapure (91/100), holds both Creapure and Informed Sport certification. Third-party testing costs manufacturers money and most skip it because UK regulations don't require it for sports supplements.

Q: Is creatine monohydrate better than HCL or other forms?

Based on our data, creatine monohydrate dominates the top of the rankings. The top 5 creatine products by overall score are all monohydrate-based, with the highest scoring 91/100 (Bulk Creapure). Creatine HCL products in our database score lower on average. Monohydrate has decades of clinical research behind it and is the only form with strong evidence for muscle performance. HCL is marketed as 'better absorbed' but there is limited independent evidence to support that claim at the doses typically sold.

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Bulk Creatine Monohydrate (Creapure) 500g and Optimum Nutrition Micronized Creatine Powder 317g.

Last verified: 07 Apr 2026 · Based on 32 reviews

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91.0

Quick Answer

Bulk Creatine Monohydrate (Creapure) 500g scores 91.0/100 vs Optimum Nutrition Micronized Creatine Powder 317g at 79.0/100. Bulk Creatine Monohydrate (Creapure) 500g wins on effectiveness, ingredient quality, value for money. Optimum Nutrition Micronized Creatine Powder 317g is stronger on side effects.

Which is better: Bulk Creatine Monohydrate (... or Optimum Nutrition Micronize...?

Bulk Creatine Monohydrate wins decisively with a 91/100 score versus ON's 79/100, offering Creapure-certified quality and a full 5g serving at nearly identical price. ON's 3.4g serving means users must overspend per effective dose, making its £16.00 price deceptive. Only choose ON if you already have it to hand or prefer micronized texture in shakes.

— AIScored Editorial Team

How Do the Scores Compare?

Bulk Creatine Monohydrate (...

Optimum Nutrition Micronize...

	Bulk Creatine Monohydrate (... Bulk	Optimum Nutrition Micronize... Optimum Nutrition
Overall Score	91.0	79.0
Effectiveness	89.0/100 Best	77.0/100
Ingredient Quality	96.0/100 Best	92.0/100
Value for Money	91.0/100 Best	68.0/100
Side Effects	84.0/100	91.0/100 Best
Certifications	96.0/100 Best	86.0/100
Best Price	£16.99 Amazon UK →	£16.00 Amazon UK → Cheapest
Price per Serving	£0.17 100 servings Best value	£0.17 93 servings Best value
Form	Powder	Powder
Dose	5g per serving	3.4g creatine monohydrate per serving (approx 3g pure creatine)
Third-Party Tested	✓ Yes	✓ Yes
Reviews Analysed	14	18

Bulk Creatine Monohydrate (Creap...

Pros

✓Creapure-certified: pharmaceutical-grade German creatine monohydrate, not Chinese-sourced
✓Informed Sport certified for banned substance testing — safe for competitive athletes
✓Consistently praised for strength and performance gains across multiple reviewers
✓Cognitive benefits (memory, mental clarity) reported, especially by female and older users

Cons

✗Unflavoured taste is neutral at best — one reviewer described it as 'gritty chalk water' with plain water
✗Powder can settle or leave residue at the bottom if not stirred thoroughly
✗Initial water retention is common with creatine monohydrate loading; requires adequate hydration
✗No flavoured option in this SKU — users who dislike plain creatine must mix it into shakes

Best For

Strength and resistance athletes seeking proven performance gains Competitive athletes requiring Informed Sport banned substance clearance Women and post-menopausal women interested in cognitive and strength benefits Value-conscious buyers who want Creapure quality without premium brand markup Beginners wanting a pure, simple creatine with no additives or flavourings

Amazon UK £16.99

View full review →

Optimum Nutrition Micronized Cre...

Pros

✓Pure micronized creatine monohydrate — the most researched and evidence-backed form of creatine available
✓Informed Choice certified, meaning each batch is tested for banned substances — important for competitive athletes
✓Zero fillers, flavours, or additives; fully vegan and free from all major allergens
✓Micronized particle size mixes more cleanly in liquid than standard creatine, reducing grit and residue

Cons

✗Serving size is 3.4g, which falls short of the 5g daily dose used in virtually all clinical efficacy studies — users need to scoop ~1.5 servings to hit the research-backed dose, reducing the effective yield to roughly 62 servings rather than 93
✗No loading protocol guidance on the label; new users unfamiliar with creatine may under-dose
✗Premium brand pricing means cheaper certified alternatives exist at the same or higher dose per gram
✗One Trustpilot submission flagged dismissive customer service, suggesting post-sale support may be inconsistent

Best For

Strength and resistance training athletes looking for performance and power output gains Competitive or tested athletes who need Informed Choice-certified products People who prefer to add creatine to existing shakes or meals without altering taste Beginners wanting a reputable, clean entry-point creatine with no proprietary blends

Amazon UK £16.00

View full review →

What does the data say about Bulk Creatine Monohydr... vs Optimum Nutrition Micr...?

Bulk Creatine Monohydrate from Bulk uses 5g of Creapure-certified German creatine monohydrate per serving while Optimum Nutrition Micronized Creatine Powder delivers just 3.4g per scoop which equals about 3g of actual creatine. That difference matters because nearly every study on performance uses a full 5g daily dose. Bulk scores 91.0/100 overall with 89.0/100 on effectiveness and 96.0/100 on ingredient quality. Optimum Nutrition lands at 79.0/100 total with 77.0/100 effectiveness and 92.0/100 ingredient quality. Both come as plain powders you mix into drinks or food yet Bulk gives you 100 full servings in its 500g tub for £16.99 whereas the 317g Optimum Nutrition pack works out far less efficient once you double up scoops to hit the proper amount.

Competitive athletes who need Informed Sport clearance should grab the Bulk version straight away. It delivers the exact dose that drives real strength gains and gets praise from users for consistent progress in the gym. Women after cognitive benefits or post-menopausal lifters will also prefer it. Pick Optimum Nutrition only if you already mix creatine into big protein shakes and want zero taste impact at all. Its lower 68.0/100 value score shows the poor maths on servings. Budget buyers get more creatine for similar money with Bulk.

The unflavoured Bulk powder tastes like gritty chalk in plain water and needs proper stirring or it leaves residue at the bottom. Optimum Nutrition mixes cleaner thanks to micronisation and adds nothing that triggers common allergies. Both stay completely vegan. New users should check the label carefully on Optimum Nutrition since it skips loading instructions and under-doses easily.

Bulk Creatine Monohydrate (Creapure) 500g Winner 91.0/100

Bulk Creatine Monohydrate (Creapure) is a pure, additive-free creatine powder sourced from AlzChem's German Creapure facility and independently verified by Informed Sport — making it one of the cleanest and most credentialed creatine options available in the UK at this price point.

Effectiveness

Bulk Creatine Mo..

89.0/100

Optimum Nutritio..

77.0/100

Ingredient Quality

Bulk Creatine Mo..

96.0/100

Optimum Nutritio..

92.0/100

Value for Money

Bulk Creatine Mo..

91.0/100

Optimum Nutritio..

68.0/100

Side Effects

Bulk Creatine Mo..

84.0/100

Optimum Nutritio..

91.0/100

Certifications

Bulk Creatine Mo..

96.0/100

Optimum Nutritio..

86.0/100

What are the key differences?

Bulk Creatine Monohydra.. is best for: Strength and resistance athletes seeking proven performance gains, Competitive athletes requiring Informed Sport banned substance clearance

Optimum Nutrition Micro.. is best for: Strength and resistance training athletes looking for performance and power output gains, Competitive or tested athletes who need Informed Choice-certified products

Frequently Asked Questions

Which is better, Bulk Creatine Monohydrate (Creapure) 500g or Optimum Nutrition Micronized Creatine Powder 317g? ▼

Bulk Creatine Monohydrate (Creapure) 500g scores 91.0/100 overall while Optimum Nutrition Micronized Creatine Powder 317g scores 79.0/100. Bulk Creatine Monohydrate (Creapure) 500g comes out ahead, scoring higher on effectiveness (89.0 vs 77.0). Bulk Creatine Monohydrate (Cre is best suited for Strength and resistance athletes seeking proven performance gains and Competitive athletes requiring Informed Sport banned substance clearance. Optimum Nutrition Micronized C is better for Strength and resistance training athletes looking for performance and power output gains and Competitive or tested athletes who need Informed Choice-certified products.

Is Bulk Creatine Monohydrate (Creapure) 500g worth the price compared to Optimum Nutrition Micronized Creatine Powder 317g? ▼

Bulk Creatine Monohydrate (Creapure) 500g costs £16.99 while Optimum Nutrition Micronized Creatine Powder 317g is £16.00. For value, Bulk Creatine Monohydrate (Creapure) 500g scores 91.0/100 vs Optimum Nutrition Micronized Creatine Powder 317g's 68.0/100. Bulk Creatine Monohydrate (Creapure) 500g delivers better value relative to its quality.

Which has fewer side effects? ▼

Bulk Creatine Monohydrate (Creapure) 500g scores 84.0/100 for side effects (higher means fewer reported issues) while Optimum Nutrition Micronized Creatine Powder 317g scores 91.0/100. Reviewers report fewer side effects with Optimum Nutrition Micronized Creatine Powder 317g. For certification and testing, Bulk Creatine Monohy scores 96.0/100 vs Optimum Nutrition Mi's 86.0/100. Always consult a healthcare professional before starting any supplement.