Casein is milk-derived. It is compatible with a vegetarian claim but not a vegan one — and it is best known for appearing where buyers least expect dairy, including products marketed as non-dairy. On US labels it triggers a milk allergen declaration, which makes it easier to catch than most hidden animal ingredients.
What it means for each mark
- VeganDairy-derived — a vegan formulation replaces caseinates with plant proteins.
- VegetarianA milk protein from live animals — compatible with vegetarian claims.
Where it typically hides
- Coffee creamers and whiteners labeled non-dairy (sodium caseinate)
- Protein bars and blended protein powders
- Processed cheese and cheese analogs
- Bakery glazes, coatings and some breads
- Wine fining (a processing aid that may not reach the label)
What a certification review asks for
- A protein source declaration for every protein ingredient in the formulation
- The allergen statement cross-checked against the full recipe — caseinates must declare milk
- Fining and processing-aid disclosure for beverages
Alternatives
- Soy protein isolate
- Pea protein
- Oat and other cereal proteins, allergen profile permitting
- Potato protein or bentonite for wine fining
Frequently asked questions
Why does non-dairy creamer contain casein?
US labeling practice has allowed the term non-dairy on products containing caseinate, a milk protein, because caseinate is not fluid milk. Casein is still dairy-derived, so such products are not vegan.
Is casein vegetarian?
Yes. Casein comes from milk, not slaughter, so it is compatible with vegetarian standards.
Is casein the same as whey?
No. Both are milk proteins, but casein is the curd fraction while whey is the liquid fraction separated in cheesemaking. Both are dairy-derived and neither is vegan.