Casein.bio
Independent reviews of the world’s leading casein protein powders.
No sponsorships Evidence‑based fitness Affiliate‑supported

Find the right casein protein powder for your muscle‑building goals – without the hype.

We assess ingredients, protein quality, real‑world feedback, and price‑per‑serving so you don’t have to. Compare casein protein powders in one place.

  • See which casein protein powders work best for slow‑release protein and overnight recovery.
  • Understand the difference between micellar casein and other casein types.
  • Spot red flags like artificial sweeteners and low protein content.
Our goal is simple: help you pick a safe, effective casein protein – and avoid wasting money on misleading marketing.

Top casein protein powders – side by side

Ratings are based on protein quality, ingredient transparency, price‑per‑serving, and real‑world feedback. We may earn a commission when you buy via our links – at no extra cost to you.

Shop Product Best for Type Key details Our rating Price*
View offer Optimum Nutrition Gold Standard 100% Micellar Casein Protein Powder
Best for slow‑release & overnight recovery
Overnight recovery · muscle gain Micellar casein 24 g protein per serving, slow‑digesting, helps keep you full during sleep.
★★★★★
4.8 / 5 formula score
~$45
≈ $1.35 per serving
View offer Nutricost Casein Protein Powder 5 lb
Best for budget micellar casein
Budget buyers · slow‑digesting Micellar casein Gluten free, non‑GMO, 5 lb for value.
★★★★☆
4.4 / 5 formula score
~$40
≈ $1.10 per serving
View offer BODYTECH Micellar Casein Protein Powder
Best for compact size
2 lb size · overnight recovery Micellar casein 24 g protein per serving, rich chocolate, designed for overnight use.
★★★★☆
4.3 / 5 formula score
~$35
≈ $1.25 per serving
View offer BSN SYNTHA‑6 Whey / Micellar Casein Blend
Best mixed protein + casein blend
All‑round users · night‑time mix Mixed whey + casein Blend of micellar casein, whey, milk protein isolate; 28 servings.
★★★★☆
4.2 / 5 formula score
~$38
≈ $1.35 per serving

*Prices and availability are approximate and can change at any time. Always check the latest price on the retailer’s website.

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