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Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg vs PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg and PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g.

Last verified: 07 Apr 2026 · Based on 27 reviews

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85.0
Quick Answer

Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg scores 85.0/100 vs PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g at 81.0/100. Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg wins on value for money, certifications. PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g is stronger on ingredient quality and side effects.

How Do the Scores Compare?

Optimum Nutrition Gold Stan...
PINK SUN Whey Protein Isola...
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg
Optimum Nutrition Gold Stan...
Optimum Nutrition
 PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g
PINK SUN Whey Protein Isola...
PINK SUN
Overall Score 85.0 81.0
Effectiveness 87.0/100
Best
 87.0/100
Best
Ingredient Quality 80.0/100 91.0/100
Best
Value for Money 82.0/100
Best
 71.0/100
Side Effects 83.0/100 91.0/100
Best
Certifications 90.0/100
Best
 48.0/100
Best Price £75.99 Amazon UK → £42.95 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 16

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

Gym-goers and recreational athletes seeking reliable post-workout protein Long-term supplement users who value brand consistency Anyone prioritising third-party tested products for sport compliance Those who want a widely available, flavour-tested product with proven palatability
Amazon UK £75.99
View full review →

PINK SUN Whey Protein Isolate Po...

Pros

  • ✓Exceptionally clean formula — no additives, sweeteners, fillers, or artificial ingredients
  • ✓92% protein content with near-zero fat, carbs, and lactose
  • ✓Neutral, unobtrusive flavour makes it highly versatile for cooking and shaking
  • ✓Grass-fed, hormone-free source milk with undenatured processing

Cons

  • ✗No third-party lab certification listed (informed-sport, Labdoor, etc.)
  • ✗Packaging is soft bag format — can be awkward to store upright
  • ✗One reviewer reported clumping and off-smell (isolated complaint but worth noting)
  • ✗Premium price point; international shipping can significantly increase cost

Best For

Clean-eating and wholefood diet followers People sensitive to lactose, soy, or gluten Keto and low-carb dieters Over-50s seeking a light, easily digestible protein source Athletes who prefer to customise flavour themselves Anyone who has experienced GI issues with flavoured or additive-heavy proteins
Amazon UK £42.95
View full review →

What does the data say about Optimum Nutrition Gold... vs PINK SUN Whey Protein ...?

Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg Winner 85.0/100

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.

Effectiveness
Optimum Nutritio..
87.0/100
PINK SUN Whey Pr..
87.0/100
Ingredient Quality
Optimum Nutritio..
80.0/100
PINK SUN Whey Pr..
91.0/100
Value for Money
Optimum Nutritio..
82.0/100
PINK SUN Whey Pr..
71.0/100
Side Effects
Optimum Nutritio..
83.0/100
PINK SUN Whey Pr..
91.0/100
Certifications
Optimum Nutritio..
90.0/100
PINK SUN Whey Pr..
48.0/100

What are the key differences?

Optimum Nutrition Gold .. is best for: Gym-goers and recreational athletes seeking reliable post-workout protein, Long-term supplement users who value brand consistency
PINK SUN Whey Protein I.. is best for: Clean-eating and wholefood diet followers, People sensitive to lactose, soy, or gluten

Frequently Asked Questions

Which is better, Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg or PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g? ▼
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg scores 85.0/100 overall while PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g scores 81.0/100. Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg comes out ahead, scoring higher on effectiveness (87.0 vs 87.0). Optimum Nutrition Gold Standar is best suited for Gym-goers and recreational athletes seeking reliable post-workout protein and Long-term supplement users who value brand consistency. PINK SUN Whey Protein Isolate is better for Clean-eating and wholefood diet followers and People sensitive to lactose, soy, or gluten.
Is Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg worth the price compared to PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g? ▼
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg costs £75.99 while PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g is £42.95. For value, Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg scores 82.0/100 vs PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g's 71.0/100. Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg delivers better value relative to its quality. Note that Optimum Nutrition Go comes as powder while PINK SUN Whey Protei is ‎powder, which may affect your preference.
Which has fewer side effects? ▼
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg scores 83.0/100 for side effects (higher means fewer reported issues) while PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g scores 91.0/100. Reviewers report fewer side effects with PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g. For certification and testing, Optimum Nutrition Go scores 90.0/100 vs PINK SUN Whey Protei's 48.0/100. Always consult a healthcare professional before starting any supplement.

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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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