We Tested 13 Protein Powders in the UK — Scores, Reviews & Prices
Whey, casein, and plant-based protein powders. Compare protein per serving, ingredients, taste ratings, and prices from UK sports nutrition retailers.
We analysed 13 protein powders using currently available review and product data from public sources. We evaluate each product across six categories — effectiveness, ingredient quality, value for money, side effects, certifications, and overall score — so you can make an informed decision without spending hours reading individual reviews.
🏆 View Best Protein Powders 2026 Rankings →What are the best protein powders in 2026?
According to the AIScored 0–100 scoring system, the highest-rated protein powders in the UK are: Gold Standard 100% Casein Powder Chocolate 924g (80.0/100), Optimum Nutrition Gold Standard 100% Casein 1.82kg (76.0/100), Myprotein Slow-Release Casein 2.5kg (70.0/100). Rankings are based on 13 products scored across effectiveness, ingredient quality, value for money, side effects, and certifications.
| Rank | Product | Brand | Score | Price |
|---|---|---|---|---|
| #1 | Gold Standard 100% Casein Powder Chocolate 924g | Optimum Nutrition | 80.0/100 | £50.00 |
| #2 | Optimum Nutrition Gold Standard 100% Casein 1.82kg | Optimum Nutrition | 76.0/100 | £67.95 |
| #3 | Myprotein Slow-Release Casein 2.5kg | Myprotein | 70.0/100 | £67.64 |
| #4 | Skyr Protein Shake Strawberry Yoghurt 300g | All Stars | 70.0/100 | £0.85 |
| #5 | Diet Protein Strawberry Milkshake 450g (18 Servings) | Applied Nutrition | 70.0/100 | £15.00 |
| #6 | Diet Protein Chocolate Dessert 450g (18 Servings) | Applied Nutrition | 70.0/100 | £15.00 |
| #7 | Diet Protein Salted Caramel 450g (18 Servings) | Applied Nutrition | 70.0/100 | £15.00 |
| #8 | Skyr Protein Shake Vanilla Honey 300g | All Stars | 70.0/100 | £20.00 |
| #9 | Huel Nutritionally Complete Food Powder - 100% Vegan... | Huel | 67.0/100 | £39.10 |
| #10 | Casein Protein Powder | Dymatize | 64.0/100 | £59.20 |
13 products
Which protein powders rank highest in 2026?
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Gold Standard 100% Casein Powder Chocolate 924g
Optimum Nutrition
Optimum Nutrition's Gold Standard 100% Casein Powder delivers 24g of micellar casein per serving with minimal fat and su...
Optimum Nutrition Gold Standard 100% Casein 1.82kg
Optimum Nutrition
Optimum Nutrition Gold Standard 100% Casein is a benchmark slow-digesting protein powder built around micellar casein, w...
Myprotein Slow-Release Casein 2.5kg
Myprotein
Myprotein Slow-Release Casein 2.5kg uses micellar casein — the gold standard slow-digesting protein form — delivering 23...
Skyr Protein Shake Strawberry Yoghurt 300g
All Stars
Skyr Protein Shake Strawberry Yoghurt by All Stars is a cultured Icelandic dairy-based protein product with reviewers co...
Diet Protein Strawberry Milkshake 450g (18 Servings)
Applied Nutrition
Applied Nutrition Diet Protein Strawberry Milkshake receives unanimous 5/5 ratings from 4 reviewers who praise its taste...
Diet Protein Chocolate Dessert 450g (18 Servings)
Applied Nutrition
Applied Nutrition Diet Whey Protein Chocolate Dessert is a 20g-per-serving whey protein powder formulated with weight ma...
Diet Protein Salted Caramel 450g (18 Servings)
Applied Nutrition
Applied Nutrition Diet Protein is a 20g-per-serving whey-based protein powder with added weight-management ingredients (...
Skyr Protein Shake Vanilla Honey 300g
All Stars
All Stars Skyr Protein Shake is an Icelandic cultured dairy protein product positioned as a nutrient-dense, high-protein...
Huel Nutritionally Complete Food Powder - 100% Vegan Powdered Meal (1 Pouch - 3.75lb - 17 servings) (Chocolate)
Huel
Huel's powder packs 400 kcal per two-scoop serving around pea protein, oat flour, and flaxseed, with 27 vitamins and min...
Casein Protein Powder
Dymatize
Dymatize Elite Casein is a micellar casein protein powder designed for slow-release protein delivery over 4–8 hours, mak...
BSN Syntha-6 Protein Powder Chocolate 2.27kg
BSN
BSN Syntha-6 Chocolate 2.27kg is a popular multi-source protein blend combining whey concentrate, whey isolate, whey hyd...
Diet Protein Vanilla Ice Cream 450g (18 Servings)
Applied Nutrition
Applied Nutrition's Diet Protein Vanilla Ice Cream is a low-calorie whey blend delivering 20g protein and 4g+ BCAAs per ...
Huel Black Edition - Nutritionally Complete 100% Vegan Gluten-Free - Less Carbs More Protein - Powdered Meal (Chocolate, 1 Bag)
Huel
Huel Black Edition delivers 40g of pea and rice protein per serving alongside 27 vitamins and minerals — an unusually co...
What are the most popular uses for protein powders?
Filter products by common goals and user profiles in this category.
How do the top protein powders compare head-to-head?
See all side-by-side comparisons between protein powders products.
How does AIScored compare protein powders?
We collect currently available review and product data from public sources to build a complete comparison baseline.
We read every review, check ingredient labels, fillers, and certifications, then generate an unbiased summary.
Products are scored 0-100 across evidence-based categories, making it easy to compare at a glance.
Which protein powders buying guides are available?
Long-tail guides for specific goals in protein powders.
What should you look for when buying protein powders?
Choosing the right protein powders can be overwhelming with hundreds of options on the UK market. Here are the key factors we analyse when scoring each product:
Bioavailability & Forms
Not all ingredient forms are equally effective. We check which forms are used and whether they're backed by research for optimal absorption and bioavailability.
Clean Label & Fillers
Many products contain unnecessary fillers, artificial colours, added sugars, and bulking agents. We flag products with excessive additives and reward clean formulations.
Third-Party Testing
Independent lab testing verifies that what's on the label is actually in the product. Products with third-party certifications (NSF, USP, Informed Sport) score higher in our rankings.
Value per Serving
The cheapest option isn't always the best value. We calculate the cost per serving and weigh it against ingredient quality, dosage, and overall effectiveness reported by users.
How Our Scoring Works
Each product is scored 0-100 across evidence-based categories. An overall score of 80+ indicates a product we'd recommend to most people. Scores of 60-79 are solid choices with some trade-offs, while anything below 60 has significant drawbacks reported by users. Our scores are recalculated regularly as new reviews and ingredient data come in.
Frequently Asked Questions
Where do you get your reviews?
We aggregate publicly available review and product data from retailer pages, communities, and specialist sources. We do not use manufacturer-provided testimonials as evidence.
How often are scores updated?
We re-analyse reviews and update scores regularly. Product pages show the date of the latest analysis.
Do you receive products for free?
No. AIScored does not accept free products or sponsored placements. Our revenue comes from affiliate links, which do not influence our scores.
What is the best protein powders in 2026?
Based on our analysis of 13 products, the top rated protein powders is Gold Standard 100% Casein Powder Chocolate 924g with a score of 80.0/100.
How many protein powders products have you reviewed?
We have analysed 13 protein powders products, scoring each on effectiveness, ingredient quality, value for money, side effects, and certifications.
What other categories are related to protein powders?
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Prices are updated regularly but may differ at the time of purchase. Affiliate links may earn us a commission at no extra cost to you.