Casein is milk protein, and it turns up in surprising places, including some non-dairy creamers and a few plant-styled cheeses.
Made fromMilk protein
Also listed asSodium or calcium caseinate
VerdictNot vegan
Where it hides
Some non-dairy coffee creamers
A few plant-style cheeses
Protein bars and powders
Some processed and packaged foods
What it is
Casein is the main protein in cow's milk, and caseinate, its sodium or calcium salt, is the same thing processed for texture and melt. US law lists milk among the major food allergens, and casein is one of the milk-derived ingredients that labelling is meant to flag. Because it comes straight from milk, it is not vegan.
Where it hides
Casein is the classic gotcha in products that sound plant-based. It shows up in some non-dairy coffee creamers, where non-dairy is a marketing term rather than a promise, and in a handful of melty plant-styled cheeses that use caseinate for stretch. Protein bars and powders lean on it too. The dairy trio to scan for together is casein, whey and lactose.
WheyWhey is the liquid left when milk curdles, dried into powder. It is milk, so it is not vegan, and it hides in more than protein shakes.
LactoseLactose is milk sugar. Even though it is a carbohydrate rather than a protein, it comes from milk, so it is not vegan.
Protein on a vegan dietThe Evidence · The 'where do you get your protein' question has a boring, well-documented answer: from plants, across the day, and the complete-versus-incomplete framing was retired years ago.
Frequently asked
Can a non-dairy product contain casein?
Yes. In the US, non-dairy is a marketing term, not a legal guarantee of no milk. Some non-dairy creamers contain sodium caseinate, a milk protein, so the ingredient list is what to read.
Is casein in vegan cheese?
Real vegan cheese contains no casein, but a few plant-styled cheeses that melt well use caseinate for stretch and are therefore not vegan. Check for a vegan label or scan the ingredients.
Definition of veganism · The Vegan Society, 2024 · vegan diet excludes all products derived from animals
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