Myprotein Slow-Release Casein 2.5kg
by Myprotein
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Myprotein Slow-Release Casein 2.5kg uses micellar casein — the gold standard slow-digesting protein form — delivering 23g protein per 30g serving across a generous 83-serving tub. Best for Bodybuilders and strength athletes using casein before bed for overnight muscle protein synthesis and Budget-conscious gym-goers wanting slow-release protein at a lower price point than whey isolate.
According to the AIScored 0–100 scoring system, Myprotein Slow-Release Casein 2.5kg by Myprotein scores 70.0/100, ranking #6 out of 13 products in Protein Powders (2026). Strongest category: Value For Money (82.0/100). Weakest: Certifications (32.0/100).
Is Myprotein Slow-Release Casein 2.5kg worth buying?
“Myprotein's Slow-Release Casein uses micellar casein at 23g protein per serving with impressively clean ingredients for the price — most competitors either use cheaper casein forms or add unnecessary thickeners like carrageenan. With 83 servings in a 2.5kg tub and a 70/100 score, it's excellent value if you're serious about casein for overnight muscle recovery.”
What Do Reviewers Say About Myprotein Slow-Release Casein 2.5kg?
Sample excerpts from currently available source material used in this product analysis.
"Great products at great prices. Easy to order, decent prices and improved delivery time to next day which was great. Easy to navigate and find the products I wanted."
"Discounts are not auto added at checkout. If you forget to add the discount code at checkout you will not be refunded the difference. The business model relies on people forgetting to increase profit margins. Protein is cheaper on amazon an..."
"I have heard many good things about myprotein and have seen a lot of yt reviews too which generally praise it. But why is casein so cheap compared to whey protein? Is there any catch here aside from bad taste of casein? The price is very bu..."
"I have tried using pure whey and pure casein (MyProtein and Legion), and blending leads to better texture basically always in my opinion. MyProtein casein works well when mixed with whey concentrate - the 80-20 blend gives good results for..."
"I ordered 4 tubs of creatine and 2 arrived with broken seals. As someone who takes supplement safety seriously, receiving tampered products is completely unacceptable. Customer service was unhelpful for two weeks and then banned my account..."
How does Myprotein Slow-Release Casein 2.5kg score?
Detailed score breakdown and key findings from our analysis of 13 reviews across 3 sources.
Pros
- +Micellar casein — the most bioavailable, slowest-digesting form ideal for overnight recovery
- +Cleaner additive profile than ON Gold Standard Casein — single thickener (xanthan gum), no carrageenan
- +Strong value for money — casein at Myprotein pricing with 83 servings per 2.5kg tub
- +Good mixability reported — dissolves quickly in liquid, uncommon for casein
- +Made in the UK with four flavour options including Unflavoured for stacking
Cons
- -Not third-party tested (Informed Sport, NSF) — relevant for athletes subject to testing
- -Contains soy lecithin — unsuitable for soy-allergic users; may contain gluten, egg, nuts
- -Casein taste can be chalky or overly sweet — one reviewer noted sweetness as a concern
- -Myprotein customer service has recurring complaints; discount codes not auto-applied at checkout
Best For
Watch Out
- !Soy and milk allergens present; may contain gluten, egg, and nuts — check if allergic
- !No third-party certification — not suitable for competitive athletes under anti-doping rules
- !Several reviews in the dataset appear to be for other Myprotein products (creatine, pre-workout) — verify sourcing
- !Casein generally thicker and harder to mix than whey; liquid ratio and shaking method matter
What is Myprotein Slow-Release Casein 2.5kg?
Myprotein Slow-Release Casein 2.5kg is a protein powders product by Myprotein in powder form, scoring 70.0/100 on AIScored.
- • Myprotein Slow-Release Casein is a slow-digesting casein protein powder in a 2.5 kg pack.
- • Reviewers often mention that it dissolves quickly in liquid, making it convenient to prepare as a protein drink.
- • It is commonly used for everyday protein supplementation, and some users mix it with whey protein to improve drink texture.
- • This product is a practical option for people who want a larger pack size and a casein-based protein powder that can be used on its own or combined with other protein powders.
What's Inside Myprotein Slow-Release Casein 2.5kg?
Myprotein Slow-Release Casein 2.5kg contains 1 active ingredient: Protein.
Active Ingredients
- Protein
- 23g per serving
Other Ingredients
Micellar Casein (Milk), Flavouring, Emulsifier (Soy Lecithin), Thickener (Xanthan Gum), Sweetener (Sucralose)
Clean Label Analysis
Cleaner additive profile than ON Casein — uses only xanthan gum as a thickener versus four thickeners in the ON version. No carrageenan. A simpler, more straightforward formula which is a genuine advantage.
Is Myprotein Slow-Release Casein 2.5kg Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
Additional Specifications
- Protein Per Serving
- 23g
- Calories Per Serving
- 107 kcal
- Protein Source
- Micellar Casein
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
How Does Myprotein Slow-Release Casein 2.5kg Compare?
See how this product stacks up against the top-rated protein powders in our database.
| Product | Score | Price |
|---|---|---|
| Myprotein Slow-Release Casein 2.5kg (this) | 70.0 | £67.64 |
| Diet Protein Chocolate Dessert 4... | 70.0 | £15.00 |
| Diet Protein Salted Caramel 450g... | 70.0 | £15.00 |
Price History (90 days)
Quick Facts
- Form
- Powder
- Dose
- 23g protein per 30g serving
- Serving
- 1 scoop (30g)
- Servings
- 83
- Vegan
- No
- Made in
- UK
Frequently Asked Questions
Is Myprotein Slow-Release Casein 2.5kg worth buying in 2026? ▼
What is the best price for Myprotein Slow-Release Casein 2.5kg in the UK? ▼
What are the pros and cons of Myprotein Slow-Release Casein 2.5kg? ▼
Is Myprotein Slow-Release Casein 2.5kg third-party tested? ▼
How does Myprotein Slow-Release Casein 2.5kg compare to Diet Protein Chocolate Dessert 450g (18 Servings)? ▼
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. Affiliate links may earn us a commission at no extra cost to you.
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