Top 10 Casein Protein Powders
Casein protein digests slowly, making it perfect before bed or for long‑lasting satiety. We’ve ranked the UK’s top casein powders by purity, taste, mixability and value — all sourced from Amazon’s top sellers.
- ✅ Updated July 2025
- 🏆 Amazon UK Bestsellers
- 🔍 Evidence‑Based Reviews
Jamie’s Tip: Micellar casein is the gold standard for overnight recovery. It thickens more than whey — so add extra liquid or blend it into a dessert.
See Rankings ↓
1
Bestseller
High Protein
Optimum Nutrition
View on Amazon
Gold Standard 100% Casein
★★★★★
Micellar Casein | 24 g Protein | 10 g EAAs | 28 Servings
Best Selling Casein Protein Powders (Compared Side by Side)
| 🥇 Optimum Casein | 🥈 PBN Micellar | 🥉 Bulk Micellar | |
|---|---|---|---|
| Protein (g) | 24 g | 24 g | 23 g |
| Calories | 115 kcal | 110 kcal | 101 kcal |
| Price/kg | £28/kg | Best Value £25/kg | £22/kg |
| Casein Type | Micellar | Micellar | Micellar |
| Texture | Smooth | Thick | Creamy |
| Sweetener | Stevia | Sucralose | Natural |
| Carbs (g) | 2 g | 3 g | 1 g |
| Servings | 28 | 66 | 30 |
| Protein % | 81% | 80% | 78% |
| Prime | Prime | Prime | Prime |
| Rating | 4.5/5 | 4.7/5 | 4.4/5 |
| Overall | Excellent | Excellent | Very Good |
| Best For | Lean Goals | All‑Rounder | Budget Pick |
| View Product → | View Product → | View Product → |
FAQs
What is casein protein?
A slow‑digesting dairy protein, ideal for nighttime use or sustained fullness.
Does it build muscle like whey?
Yes — just slower. It’s excellent for preserving muscle when fasting or sleeping.
Is it thicker than whey?
Usually, yes. It mixes to a pudding‑like texture if under‑shaken.
Can I use it during the day?
Sure — it’s great between meals or in recipes like protein puddings.
Want a faster option? Explore the best whey powders for quick absorption and recovery.
See Top Whey Powders →