Resistance-training studies used 30–40 g before sleep for 8–12 weeks with exercise
Reviewed · Published
Casein protein
A dairy protein that clots in the stomach and releases amino acids relatively slowly.
Established functions
- A dairy protein that clots in the stomach and releases amino acids relatively slowly.
Dietary sources
- milk
- cheese
Claims and evidence
Claims that Casein protein alone prevents or treats disease, or invariably improves health without deficiency, are unsupported.
Japanese reference amounts
- Japanese adults (age and sex as specified): Protein goal for adults: 1.0 g/kg body weight/day; no ingredient-specific DRI
Amounts studied
- Resistance-training studies used 30–40 g before sleep for 8–12 weeks with exercise
Tolerable upper limits
- No specific UL; account for total intake and disease
Forms and bioavailability
Supplement forms: micellar casein, calcium caseinate
- Micellar casein digests slowly, while daily protein intake matters more.
Safety and interactions
Adverse effects
- bloating
- constipation
- milk-allergy reactions
Medicine and nutrient interactions
- levodopa; spacing medicines from calcium
Contraindications and cautions
- Contraindicated in milk allergy.
Practical selection
- Compare Casein protein amount per serving, form, allergens, and batch testing; prefer a single-ingredient product suited to the intended use.
Sources and review
- Protein intake and exercise position standInternational Society of Sports Nutrition
Daiki Minaki (editorial and evidence review) ·
Frequently asked questions
How is Casein protein different from its broader supplement category?
A dairy protein that clots in the stomach and releases amino acids relatively slowly. Compare its named form and amount rather than assuming every category product supplies it.
View detailsWhat safety detail matters specifically for Casein protein?
levodopa; spacing medicines from calcium Contraindicated in milk allergy.
View details