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Micellar Casein Protein
Forms a stomach gel for 6-8 hours of sustained amino acid release — ideal for overnight muscle recovery and anti-catabolism.
What the evidence says
Casein Protein appears to help in 3 of 3 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 1997–2026 with a typical study size of 32 participants.
Based on 42 studies · 3 meta-analyses · 35 RCTs · 3,364 total participants
Confidence
HighWhat the studies found
By outcome
Casein Protein has an evidence score of 9/10 — very strong evidence based on 42 indexed studies, including 2 meta-analyses. Forms a stomach gel for 6-8 hours of sustained amino acid release — ideal for overnight muscle recovery and anti-catabolism.
The commonly studied dose of Casein Protein is 30-40g before bed. Research points to an estimated optimal dose around 35g, with a minimum effective dose near 20g. Individual response varies — start low and adjust.
The best time to take Casein Protein is before bed. Taking it with food is preferred. Casein is a slow-digesting milk protein that forms a gel (clot) in the acidic stomach environment, providing sustained amino acid release over 6-8 hours.
Creatine
Likely helpsIncreases phosphocreatine stores for faster ATP regeneration, boosting strength, power output, and cognitive function under stress.
BCAAs
Probably helpsLeucine, isoleucine, and valine metabolized directly in muscle tissue — support protein synthesis and reduce exercise fatigue.
Last reviewed May 2026 · evidence from 40 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Casein is the predominant protein in milk, making up about 80% of its protein content. Unlike whey, casein forms a gel in the stomach that slows digestion, providing a sustained release of amino acids over 6-8 hours. This makes it particularly useful before bed to prevent muscle breakdown during the overnight fasting period. Research supports its effectiveness for muscle preservation and growth when combined with resistance training.
Forms a gel in stomach for 6-8 hour amino acid release
Prevents muscle breakdown during fasting periods
Extended muscle protein synthesis window
How Casein Protein works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
30-40g before bed
Loading: Not applicable; use as needed for protein goals
Can be taken without food
| Form | Type |
|---|---|
| 🧪Micellar Casein powder | Recommended |
| 💊Calcium Caseinate | Alternative |
| 💊Casein blends | Alternative |
Micellar casein is the slowest-digesting form. Calcium caseinate digests slightly faster. Texture is thicker than whey.
Minimum: 4 weeks
Optimal: 12 weeks
Cycling: Not required
Note: Best taken before bed for overnight recovery. For post-workout, whey is a better choice. Can be mixed with water, milk, or made into pudding.
Based on systematic review (n=387) showing pre-sleep casein enhances training adaptations and increases muscle fiber size. Optimal dose identified as 30-40g. Limited to pre-sleep timing and requires concurrent exercise training.
Muscles repair while you sleep
Less muscle breakdown during dieting or fasting
Keeps you feeling full longer than whey
Too slow for immediate post-workout needs
Safe as a protein source; choose quality brands
Excellent for preventing overnight muscle loss; 40g recommended
Protein can reduce levodopa absorption; separate by 30+ minutes
Calcium in casein may reduce absorption; take separately
Calcium may reduce antibiotic absorption; separate by 2 hours
Tip: Start with smaller servings; ensure adequate hydration
Tip: May be related to lactose; try casein isolate
Casein Protein is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are bloating, digestive discomfort. Use caution if any of these apply to you: Milk allergy; Severe lactose intolerance (contains some lactose).
L-Citrulline
Likely helpsAmino acid that boosts nitric oxide production, improving blood flow, exercise performance, and recovery.
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