Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg vs 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg and 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g.
Last verified: 07 Apr 2026 · Based on 23 reviews
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg scores 85.0/100 vs 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g at 80.0/100. Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg wins on effectiveness, value for money, certifications. 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g is stronger on ingredient quality and side effects.
How Do the Scores Compare?
Optimum Nutrition Gold Stan...
Optimum Nutrition
|
100% Whey Protein Isolate, ...
Purition
|
|
|---|---|---|
| Overall Score | 85.0 | 80.0 |
| Effectiveness |
87.0/100
Best
|
84.0/100 |
| Ingredient Quality | 80.0/100 |
91.0/100
Best
|
| Value for Money |
82.0/100
Best
|
68.0/100 |
| Side Effects | 83.0/100 |
89.0/100
Best
|
| Certifications |
90.0/100
Best
|
28.0/100 |
| Best Price | £75.99 Amazon UK → |
£26.00
Amazon UK →
Cheapest
|
| Price per Serving | £1.03 74 servings | N/A |
| Form | Powder | Powder |
| Dose | 24g protein per 30.4g serving | None |
| Third-Party Tested | ✓ Yes | ✗ No |
| Reviews Analysed | 11 | 12 |
Optimum Nutrition Gold Standard ...
Pros
- ✓Consistently praised taste and mixability across multiple reviewers
- ✓Whey Protein Isolate listed as primary source — higher protein purity than concentrate-led formulas
- ✓Informed Choice and Banned Substance Tested certifications provide confidence for athletes
- ✓Strong value for money at 74 servings per 2.27 kg tub
Cons
- ✗Contains artificial sweeteners (sucralose and acesulfame potassium) which some consumers prefer to avoid
- ✗Not suitable for those with milk or soy allergies due to whey and soy lecithin content
- ✗Holland & Barrett reviews skew heavily 5-star, offering limited critical perspective
- ✗Customer service quality flagged as poor in at least one verified Trustpilot complaint
Best For
100% Whey Protein Isolate, 93% P...
Pros
- ✓Exceptionally high protein content at 93% — higher than most UK isolates
- ✓No artificial sweeteners, flavours, or soy — praised by multiple reviewers as a rare combination
- ✓Excellent digestive tolerance — several reviewers specifically note absence of bloating
- ✓Near-neutral taste enables seamless mixing into savoury dishes, coffee, matcha, and smoothies
Cons
- ✗Price per gram is higher than mainstream UK brands like Bulk or Myprotein
- ✗Only available in 500g (20 servings) — no larger bags for frequent users
- ✗Contains sunflower lecithin, which may concern strict 'single ingredient' buyers
- ✗No third-party testing or certification (e.g. Informed Sport)
Best For
What does the data say about Optimum Nutrition Gold... vs 100% Whey Protein Isol...?
Optimum Nutrition Gold Standard 100% Whey is widely regarded as an industry benchmark protein powder, with reviewers consistently praising its taste, mixability, and value for money.
What are the key differences?
Frequently Asked Questions
Which is better, Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg or 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g? ▼
Is Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg worth the price compared to 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g? ▼
Which has fewer side effects? ▼
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What the Data Says
What makes a clean whey protein? Ingredient quality scores across 169 UK products
Fewer ingredients = cleaner protein. We scored 169 whey proteins on ingredient quality (IQ) and the gap between top and bottom is massive: 65 points, from 95/100 down to 30/100.
The top 7 products by IQ all share one trait — minimal ingredient lists:
- PINK SUN Organic Whey Concentrate — IQ 95, overall 85
- Isopure Unflavoured Whey Isolate — IQ 91, overall 76
- LEGION Whey+ Isolate — IQ 91, overall 80
- PINK SUN Whey Isolate Unflavoured — IQ 91, overall 81
- Purition 100% Whey Isolate 93% Protein — IQ 91, overall 80
- Dymatize ISO100 — IQ 90, overall 84
- Naked Whey (1 ingredient) — IQ 90, overall 74
The bottom tells the opposite story. Products like BodyFuel Clear Protein (IQ 30), Amfit Nutrition (IQ 38), and Protein Dynamix 3XP (IQ 38) use multi-source protein blends padded with artificial sweeteners, thickeners, and colourings.
The average across all 169 products is 70.7/100. If your whey protein has more than 5-6 ingredients, check what's filling up that list. A clean whey needs protein, maybe a natural flavour, and not much else.
Can cheap whey protein cause bloating? What to check on the label
Cheap whey often causes bloating because of what's added to the protein, not the protein itself. We scored 169 whey proteins and the worst-scoring products share the same filler-heavy ingredient profiles.
Three categories of additives show up repeatedly in low-IQ products (scored 30-42):
- Thickeners — xanthan gum, carrageenan, cellulose gum. These bulk up texture but can cause gas and bloating in sensitive stomachs.
- Artificial sweeteners — sucralose, acesulfame-K, aspartame. Linked to gut microbiome disruption in some studies. Budget brands use these heavily.
- Anti-caking agents and emulsifiers — added to improve mixability, but another source of digestive irritation.
Products like BodyFuel Clear Protein (IQ 30), Amfit Nutrition (IQ 38), and SCI-MX Ultra Muscle (IQ 42) stack several of these additives together.
Compare that to the top scorers: PINK SUN Organic Whey (IQ 95) and Naked Whey (IQ 90) use 1-3 ingredients total. No thickeners, no artificial sweeteners, no fillers. Users report far less digestive trouble with these minimal formulas.
Label check shortcut: flip the tub over. If the ingredient list has more than 6 items, or you spot carrageenan, sucralose, or acesulfame-K, that's your likely bloating culprit. A whey isolate with a short list costs a bit more but your gut will thank you.
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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