Overview
Slow-digesting milk protein providing sustained amino acid release, popular pre-sleep.
- Dairy
- Micellar casein
- Calcium caseinate
Mechanism of action
Forms clot in stomach producing sustained 6–8h amino acid release.
- · Sustained MPS substrate
Effects on the body
Organ system effects
Improves overnight MPS when consumed pre-sleep.
Evidence-based benefits
Pre-sleep casein increases overnight MPS and morning recovery
Moderate evidencePotential side effects
- · Bloating
Drug interactions
Supplement interactions
- Creatine monohydrateFoundational support for strength, power, and lean mass.
- Whey or EAAsProvides amino acid substrate for muscle protein synthesis.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
Affiliate links — we may earn a commission at no extra cost to you. Amazon code supplementsch-20 is auto-applied at checkout. We don't endorse specific brands; verify third-party testing (USP, NSF, Informed Sport) before purchase.
Third-party testedIndependently verified Casein Protein — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Casein Protein third party tested NSF
CapsulesPre-measured Casein Protein capsules — easiest for travel and consistent daily dosing without scoops or scales.Casein Protein capsules
PowderBulk unflavored Casein Protein powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Casein Protein powder unflavored
Best sellersMost-purchased Casein Protein products on Amazon — a quick way to see what's reviewed widely before you commit.Casein Protein best sellerScientific evidence8Show studiesHide studies
Casein Protein: pharmacology, clinical evidence, and safety — narrative review
Examine.com Research Team
Curated narrative review of human and preclinical evidence for Casein Protein, including mechanism, typical dosing, and safety considerations.
Best-supported outcome: Pre-sleep casein increases overnight MPS and morning recovery (evidence: moderate). Additional outcomes and limitations summarized in the full profile.
PubMed: Casein Protein — Pre-sleep casein increases overnight MPS and morning recovery
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PubMed: Casein Protein — randomized controlled trial
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PubMed: Casein Protein — meta-analysis
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PubMed: Casein Protein — pharmacokinetics
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PubMed: Casein Protein — safety adverse events
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PubMed: Casein Protein — dose response
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Google Scholar: Casein Protein — clinical evidence
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