Purition Whey Isolate vs Optimum Nutrition Isolate Strawberry

Q: Which is better, Purition Whey Isolate or Optimum Nutrition Isolate Strawberry?

Purition Whey Isolate scores 80/100 while Optimum Nutrition Isolate Strawberry scores 80/100 in our analysis. Both products are equally rated.

Q: Is Purition Whey Isolate worth the price compared to Optimum Nutrition Isolate Strawberry?

Purition Whey Isolate scores 68.0/100 for value, while Optimum Nutrition Isolate Strawberry scores 70.0/100. Optimum Nutrition Isolate Strawberry delivers better value overall.

Q: What makes a clean whey protein? Ingredient quality scores across 169 UK products

We scored 169 whey protein products on ingredient quality (IQ) and found a 65-point gap between the best and worst: 95/100 (PINK SUN Organic Whey Concentrate) down to 30/100 (BodyFuel Clear Protein). The average sits at 70.7/100. The pattern is simple: single-ingredient or minimal-ingredient formulas dominate the top. PINK SUN, Isopure Unflavoured, LEGION Whey+, and Naked Whey all keep their ingredient lists short and score IQ 90+. The bottom is filled with multi-blend formulas loaded with artificial sweeteners, thickeners, and colourings — Amfit Nutrition (IQ 38), Protein Dynamix 3XP (IQ 38), and Bulk Basic Whey (IQ 42) all follow this pattern.

Q: Can cheap whey protein cause bloating? What to check on the label

Yes, and the ingredient list usually explains why. Among the 169 whey proteins we scored, the lowest-quality products (IQ 30-42) are packed with thickeners like xanthan gum and carrageenan, artificial sweeteners like sucralose and acesulfame-K, and anti-caking agents. These additives are common triggers for bloating, gas, and gut discomfort. Products like Amfit Nutrition (IQ 38) and Bulk Basic Whey (IQ 42) use several of these. The fix: pick a whey isolate with a short ingredient list. The top-scoring products (IQ 90-95) typically have 1-3 ingredients and avoid these fillers entirely.

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Purition Whey Isolate and Optimum Nutrition Isolate Strawberry.

Last verified: 01 Mar 2026 · Based on 16 reviews

Back to comparison hub View whey protein guide

80.0

Score Summary

Purition Whey Isolate scores 80.0/100 vs Optimum Nutrition Isolate Strawberry at 80.0/100. Purition Whey Isolate wins on ingredient quality. Optimum Nutrition Isolate Strawberry is stronger on effectiveness and value for money.

How Do the Scores Compare?

100% Whey Protein Isolate, ...

Gold Standard 100% Isolate ...

	100% Whey Protein Isolate, ... Purition	Gold Standard 100% Isolate ... Optimum Nutrition
Overall Score	80.0	80.0
Effectiveness	84.0/100	90.0/100 Best
Ingredient Quality	91.0/100 Best	80.0/100
Value for Money	68.0/100	70.0/100 Best
Side Effects	89.0/100	90.0/100 Best
Certifications	28.0/100	40.0/100 Best
Best Price	£32.50 Amazon UK → Cheapest	£45.00 Holland & Barrett →
Form	‎Powder	None
Dose	None	None
Third-Party Tested	✗ No	✗ No
Reviews Analysed	12	4

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

Stevia/artificial sweetener avoiders People with soy allergies or intolerances Clean-label and whole-food eaters Dairy-sensitive individuals seeking low-lactose protein Cooks and food-first users who blend protein into meals Those prioritising purity over flavour variety

Amazon UK £32.50

View full review →

Gold Standard 100% Isolate Prote...

Pros

✓Excellent taste and mixability (multiple reviews praise ease of preparation)
✓High protein purity (83% protein, <0.3g sugar, <0.4g fat per serving)
✓Strong BCAA profile (5.5g naturally occurring BCAAs per serving)
✓Reputable brand with decades of research backing and consistent formulation

Cons

✗No third-party testing certification (NSF, Informed Choice, etc.) listed
✗Premium pricing compared to concentrate alternatives
✗Limited flavor variety in some regions
✗Only 4 reviews available for independent verification

Best For

Serious athletes and bodybuilders seeking high protein intake Individuals with lactose intolerance or sensitivity Post-workout recovery and muscle building Those prioritizing low sugar and fat content

Holland & Barrett £45.00

View full review →

Score Breakdown: Purition Whey Isolate vs Optimum Nutrition Isolate Strawberry

Purition Whey Isolate Winner 80.0/100

Purition's 100% Whey Protein Isolate stands out in the UK market with a genuinely high 93% protein content per 100g, no artificial sweeteners, flavours, or soy — a combination reviewers consistently praise as rare and refreshing.

Effectiveness

100% Whey Protei..

84.0/100

Gold Standard 10..

90.0/100

Ingredient Quality

100% Whey Protei..

91.0/100

Gold Standard 10..

80.0/100

Value for Money

100% Whey Protei..

68.0/100

Gold Standard 10..

70.0/100

Side Effects

100% Whey Protei..

89.0/100

Gold Standard 10..

90.0/100

Certifications

100% Whey Protei..

28.0/100

Gold Standard 10..

40.0/100

What are the key differences?

Purition Whey Isolate is best for: Stevia/artificial sweetener avoiders, People with soy allergies or intolerances

Optimum Nutrition Isolate Strawberry is best for: Serious athletes and bodybuilders seeking high protein intake, Individuals with lactose intolerance or sensitivity

Frequently Asked Questions

Which is better, Purition Whey Isolate or Optimum Nutrition Isolate Strawberry? ▼

Purition Whey Isolate scores 80.0/100 overall while Optimum Nutrition Isolate Strawberry scores 80.0/100. Both score equally overall — the difference comes down to individual dimensions. Purition Whey Isolate is best suited for Stevia/artificial sweetener avoiders and People with soy allergies or intolerances. Optimum Nutrition Isolate Strawberry is better for Serious athletes and bodybuilders seeking high protein intake and Individuals with lactose intolerance or sensitivity.

Is Purition Whey Isolate worth the price compared to Optimum Nutrition Isolate Strawberry? ▼

Purition Whey Isolate costs £32.50 while Optimum Nutrition Isolate Strawberry is £45.00. For value, Purition Whey Isolate scores 68.0/100 vs Optimum Nutrition Isolate Strawberry's 70.0/100. Optimum Nutrition Isolate Strawberry delivers better value relative to its quality.

Which has fewer side effects? ▼

Purition Whey Isolate scores 89.0/100 for side effects (higher means fewer reported issues) while Optimum Nutrition Isolate Strawberry scores 90.0/100. Reviewers report fewer side effects with Optimum Nutrition Isolate Strawberry. For certification and testing, Purition Whey Isolate scores 28.0/100 vs Optimum Nutrition Isolate Strawberry's 40.0/100. Always consult a healthcare professional before starting any supplement.

Related Product Comparisons

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

Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg

vs Gold Standard 100% Isolate Protein Strawberry 930g

PINK SUN Organic Whey Protein Concentrate Powder Unflavoured 1kg (80% Protein with BCAA) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Certified Bio UK

vs 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g

PINK SUN Organic Whey Protein Concentrate Powder Unflavoured 1kg (80% Protein with BCAA) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Certified Bio UK

vs Gold Standard 100% Isolate Protein Strawberry 930g

Dymatize ISO100 Hydrolyzed Whey Protein Isolate 2.2kg

vs 100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g

Dymatize ISO100 Hydrolyzed Whey Protein Isolate 2.2kg

vs Gold Standard 100% Isolate Protein Strawberry 930g

View all Whey Protein comparisons →

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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