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Updated: 2026-05-29 · v2.0 · Prof. G. Pkhakadze, MD, MPH, PhDCiteEditorial
📰Read the full Casein Protein evidence review on GMJ News →Complete clinical article, references and updates on news.gmj.ge. This page is the structured safety summary.
1
Safe
Casein Protein
Micellar casein / Calcium caseinate
Generally SafeStrongAmino Acids
RDA
Typical 20–40 g
Target
N/A
Upper limit
No UL
Products
124
Dosage by population group — reference
🔗 Best with: Whey Protein, Creatine, Vitamin D✅ USP Verified, NSF Certified for Sport, Informed Sport
⚠ CMPA — casein is the main cow milk allergen [1]
⚠ Micellar = slow (desired). Caseinate = fast (defeats purpose) [1]
⚠ Cottage cheese = food casein [1]
⚠ Total daily protein > source timing [2]
ℹ️ Not obtained from food. Not applicable — this is not obtained from food in meaningful amounts; supplementation is the practical route.
🔬 Lab interpreter
ℹ️ No validated blood test. There is no established laboratory test to assess status or guide dosing for this ingredient. Clinical response and symptoms are the practical guide.
⚕ For professionals — confirm ranges against your local laboratory.
Clinical verdict
Casein is the slow-release milk protein (5–7 hr) — the anti-catabolic bedtime protein. Micellar casein: native form (slow). Caseinate: processed (fast — defeats the purpose). Cottage cheese is food-based casein. Whey: post-workout. Casein: pre-sleep. Total daily protein matters most [1] [2].
1 How much do I need?
👤 Adults: Specific dosage data under clinical review
👴 Elderly: Specific dosage data under clinical review
🤰 Pregnancy: See guidance
Milk protein. Safe [1].
👦 Pediatric: See guidance
Milk protein. Safe (unless CMPA) [1].
🏃 Athletes: Standard dose
⚖️ Obesity: Standard dose
Fat-soluble compounds may require dose adjustment in obesity.
🩺 Renal: Consult specialist
Dose adjustment may be needed in renal impairment.
🌱 Vegan: Standard dose

How to take

🍽 Timing: Before bed (30–60 min) [2].
💊 With food: Can mix thick as 'pudding.' Or cottage cheese [1].
🚫 Avoid: CMPA. Levodopa timing [1].
2 Which form?
FormBioavailabilityVeganCost
['Micellar casein', 'preferred', 'Native form. Slow release. Bedtime protein [1].']StandardCheck label
['Calcium caseinate', 'common', 'Partially broken down. Intermediate absorption [1].']StandardCheck label
['Casein hydrolysate', '', 'Fast absorption. NOT slow-release [1].']StandardCheck label
3 Common questions
Casein vs whey — which is better? ▼
Different tools for different times. Whey: post-workout (fast leucine spike → MPS). Casein: bedtime (slow release → overnight anti-catabolic). Total daily protein matters more than source timing [1] [2].
Cottage cheese = casein? ▼
Essentially yes. Cottage cheese is ~80% casein. A cup before bed provides similar slow-release protein [1].
Micellar vs caseinate? ▼
Micellar: native, slow-release (the whole point). Caseinate: processed, faster absorption — defeats the purpose of choosing casein [1].
4 Clinical evidence

Strong

Slow sustained amino acid release over 5–7 hours: confirmed PK [1]. Milk protein (casein) supports muscle protein synthesis: meta-analyses [2]. HIGH

Moderate

Pre-sleep protein: RCTs show casein before bed improves overnight muscle protein synthesis and recovery [2]. Satiety: casein is more satiating than whey per gram due to slow digestion [1]. MODERATE

Insufficient

Superiority over whey for muscle building (total protein matters more than source) [2]. Weight loss beyond protein satiety effects [1]. LOW
5 Safety, toxicity & adverse events

Absolute contraindications

✕ Cow's-milk protein allergy

Relative

⚠ Lactose intolerance — may contain lactose
⚠ Chronic kidney disease — protein load

🚩 Red flags

● CMPA patient — casein is the primary allergen [1]
6 Interactions

Drug interactions

Levodopa Moderate
Mechanism: Protein amino acids compete with levodopa for LNAA transporter. [1]
Effect: Reduced levodopa absorption. [1]
Action: Time protein away from levodopa [1].

Supplement synergies

Whey (post-workout) + Casein (pre-sleep) · 25–40 g each
Fast + slow protein = optimal timing [2].
7 Regulatory
United States: GRAS food protein [1].
8 US supplement products
124
on-market products containing Casein Protein (NIH DSLD)

Brands carrying Casein Protein (61)

Click a brand to see its Casein Protein products.
Or browse all 124 products in one list →
9 Frequently paired with
Sodium 109 sharedCalcium 104 shared
Casein Protein vs Whey ProteinCasein Protein vs Creatine
10 Cite this page
Vancouver: Pkhakadze G. Casein Protein — safety profile [Internet]. Tbilisi: PHIG; 2026 [cited 2026 Aug 31]. Available from: https://supplement.ge/ingredients/casein-protein/
APA 7th: Pkhakadze, G. (2026). Casein Protein — Safety profile. Public Health Institute of Georgia. https://supplement.ge/ingredients/casein-protein/
📋 Editorial information
Author: Prof. G. Pkhakadze, MD, MPH, PhD
Affiliation: David Tvildiani Medical University (DTMU)
First published: January 2026
Last reviewed: 2026-05-29
Next review: March 2027
References: 2 cited sources
COI: SupplementIndex receives no funding from supplement manufacturers. All content independently authored by PHIG.
Process: Systematic literature review
📄 License & reuse
Published under Creative Commons Attribution 4.0 International (CC BY 4.0). You may share and adapt for any purpose with attribution.
Pkhakadze G. "Casein Protein — Safety Profile." SupplementIndex, PHIG, 2026. https://supplement.ge/ingredients/casein-protein/ CC BY 4.0.
GP
Prof. G. Pkhakadze, MD, MPH, PhD
Professor of Public Health · Head of Department, DTMU
Editor-in-Chief, Georgian Medical Journal (ISSN 3088-4322)
Chair, Public Health Institute of Georgia · UEMS Public Health Section
Educational and public health purposes. CC BY 4.0. Consult your healthcare provider before starting any supplement. Corrections: info@accreditation.ge. Publisher: PHIG
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