Optimum Nutrition Gold Standard 100% Casein 1.82kg vs Skyr Protein Shake Strawberry Yoghurt 300g
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Optimum Nutrition Gold Standard 100% Casein 1.82kg and Skyr Protein Shake Strawberry Yoghurt 300g.
Last verified: 07 Apr 2026 · Based on 16 reviews
Optimum Nutrition Gold Standard 100% Casein 1.82kg scores 76.0/100 vs Skyr Protein Shake Strawberry Yoghurt 300g at 70.0/100. Optimum Nutrition Gold Standard 100% Casein 1.82kg wins on value for money, certifications. Skyr Protein Shake Strawberry Yoghurt 300g is stronger on ingredient quality and side effects.
Which is better: Optimum Nutrition Gold Stan... or Skyr Protein Shake Strawber...?
Optimum Nutrition Gold Standard Casein wins overall (76 vs 70) with its Informed Choice certification and sustained 5–7 hour amino acid release — essential for serious athletes who train in the evening. However, the All Stars Skyr Shake offers superior ingredient quality (80 vs 67) and is a far cheaper daily option at £0.85 for those simply wanting a tasty, convenient post-workout dairy protein without competitive sport concerns.
— AIScored Editorial Team
How Do the Scores Compare?
Optimum Nutrition Gold Stan...
Optimum Nutrition
|
Skyr Protein Shake Strawber...
All Stars
|
|
|---|---|---|
| Overall Score | 76.0 | 70.0 |
| Effectiveness |
80.0/100
Best
|
80.0/100
Best
|
| Ingredient Quality | 67.0/100 |
80.0/100
Best
|
| Value for Money |
74.0/100
Best
|
60.0/100 |
| Side Effects | 72.0/100 |
90.0/100
Best
|
| Certifications |
85.0/100
Best
|
40.0/100 |
| Best Price | £67.95 Amazon UK → |
£0.85
Amazon UK →
Cheapest
|
| Price per Serving | £1.24 55 servings | N/A |
| Form | Powder | None |
| Dose | 24g protein per 33g serving | None |
| Third-Party Tested | ✓ Yes | ✗ No |
| Reviews Analysed | 12 | 4 |
Optimum Nutrition Gold Standard ...
Pros
- ✓Micellar casein delivers a sustained, slow amino acid release over 5–7 hours — well-suited for overnight recovery
- ✓Solid nutritional profile: 24g protein, 4.7g BCAAs, and 4.8g glutamine per 33g serving at only 120 kcal
- ✓Informed Choice certified — independently tested for banned substances, important for competitive athletes
- ✓Optimum Nutrition is one of the most established and consistently trusted brands in sports nutrition globally
Cons
- ✗Contains four thickening agents (cellulose gum, carrageenan, guar gum, xanthan gum) — a more complex additive profile than cleaner casein alternatives
- ✗Carrageenan is a contested ingredient; while FDA-classified as GRAS, some research raises concerns about gut inflammation in sensitive individuals
- ✗Artificial sweeteners (sucralose and acesulfame potassium) may be undesirable for users preferring naturally sweetened products
- ✗Customer service complaints noted — at least one user reported dismissive and unprofessional support from ON's team
Best For
Skyr Protein Shake Strawberry Yo...
Pros
- ✓Excellent taste and palatability—described as 'the best tasting protein powder' by reviewers
- ✓High protein content per serving (cultured dairy provides concentrated protein)
- ✓Smooth, creamy texture differentiates it from typical whey protein powders
- ✓Convenient ready-to-drink format; no mixing required
Cons
- ✗Not suitable for vegans or those with dairy intolerance
- ✗Limited product transparency—no third-party testing certification listed
- ✗Lower review volume (only 3 reviews) limits statistical reliability
- ✗Likely higher cost per serving compared to unflavored powder alternatives
Best For
What does the data say about Optimum Nutrition Gold... vs Skyr Protein Shake Str...?
Optimum Nutrition Gold Standard 100% Casein costs £67.95 for a 1.82kg tub. It provides 24g of protein and 4.7g of BCAAs per 33g serving using micellar casein. This powder releases amino acids over five to seven hours. Skyr Protein Shake Strawberry Yoghurt is a ready-to-drink option priced at £0.85. It uses cultured dairy for its protein content. While both score 80.0/100 for effectiveness, Skyr Protein Shake Strawberry Yoghurt has better ingredient quality at 80.0/100 compared to 67.0/100 for the powder. The powder contains four thickeners like carrageenan and guar gum.
Pick Optimum Nutrition Gold Standard 100% Casein if you train in the evening. It suits athletes who need sustained protein while they sleep. It offers better value for money with a 74.0/100 score. Overall, it scores 76.0/100 while Skyr Protein Shake Strawberry Yoghurt scores 70.0/100. Competitive athletes should choose it because it is Informed Choice certified. Skyr Protein Shake Strawberry Yoghurt is for people who want convenience. It is a good fit for post-workout recovery when you want a quick drink.
Taste is a major factor here. Reviewers call Skyr Protein Shake Strawberry Yoghurt the best tasting protein powder. It is not suitable for vegans or those with dairy intolerance. Skyr Protein Shake Strawberry Yoghurt lacks third-party testing certification. Optimum Nutrition Gold Standard 100% Casein is a powder you must mix yourself. It contains carrageenan which might cause gut issues for some people.
Optimum Nutrition Gold Standard 100% Casein is a benchmark slow-digesting protein powder built around micellar casein, widely used as a pre-sleep supplement to support overnight muscle recovery and protein synthesis.
What are the key differences?
Frequently Asked Questions
Which is better, Optimum Nutrition Gold Standard 100% Casein 1.82kg or Skyr Protein Shake Strawberry Yoghurt 300g? ▼
Is Optimum Nutrition Gold Standard 100% Casein 1.82kg worth the price compared to Skyr Protein Shake Strawberry Yoghurt 300g? ▼
Which has fewer side effects? ▼
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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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