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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 Gold Standard 100% Casein
Optimum Nutrition

Gold Standard 100% Casein

4.5 / 5 (7,900 reviews)
Micellar Casein | 24 g Protein | 10 g EAAs | 28 Servings
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2
Slow Release Editor’s Pick
PBN Micellar Casein Powder
PBN

Micellar Casein Powder

4.7 / 5 (5,400 reviews)
2 kg Tub | 24 g Protein | Vanilla Flavour | 66 Servings
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3
Best Value
PBN Micellar Casein Pouch
PBN

Micellar Casein Pouch

4.4 / 5 (1,820 reviews)
1 kg Bag | 23 g Protein | Chocolate Flavour | 33 Servings
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4
Fruity
Applied Nutrition 100% Casein (Strawberry Cream)
Applied Nutrition

100% Casein Protein

4.6 / 5 (3,200 reviews)
900 g | 25.2 g Protein | 5.4 g BCAAs | Strawberry Cream
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5
Natural
Bulk Micellar Casein (Vanilla)
Bulk

Micellar Casein

4.4 / 5 (4,250 reviews)
Vanilla Flavour | 23 g Protein | 101 kcal | Low Sugar
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6
Night Blend
Bulk Bedtime Protein Shake
Bulk

Bedtime Protein Shake

4.3 / 5 (2,150 reviews)
Chocolate Flavour | 30 g Protein | Theanine & HMB | Night‑time
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7
Organic
Pink Sun Organic Native Casein
Pink Sun

Organic Native Casein

4.2 / 5 (950 reviews)
Grass‑Fed | Organic | No Additives | 800 g Pouch
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8
Old‑School
Sanatogen High Protein Powder
Sanatogen

High Protein Powder

3.9 / 5 (620 reviews)
Classic Supplement | 275 g Pack | 4 Pack | Strength & Energy
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9
Gluten Free
BioTechUSA Micellar Casein
BioTechUSA

Micellar Casein

4.4 / 5 (1,300 reviews)
Vanilla Flavour | Low Sugar | 75 Servings | With Glutamine
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10
Coffee
More Protein – Iced Coffee
More

Protein – Iced Coffee

3.8 / 5 (480 reviews)
25 g Protein | Zero Sugar | Real Coffee | Smooth Shake
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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

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 →