Sodium caseinate

Case notes

A front-of-package "non-dairy" claim is the most common reason sodium caseinate slips past a careful reader. The two phrases sound interchangeable, but "non-dairy" is not the same as "milk-free" — a product can carry that claim and still list sodium caseinate in the ingredients. If the front of the package has already answered your question, the ingredient panel often goes unread.

The name itself is the second hurdle. Sodium caseinate reads like a chemical additive rather than something derived from milk, and it may appear on labels simply as casein, caseinate, or milk protein. All of these refer to the same milk-derived ingredient in the Caseins family. Casein is also known by protein names like Bos d 8, alpha-s1-casein, and alpha-s2-casein, which is useful context if you have ever seen test paperwork that didn't obviously line up with the word "milk."

Because caseins are a major milk protein that is also found in other mammalian milks such as goat, sheep, and buffalo — sharing significant homology with cow's milk caseins — cross-reactivity is common in people allergic to cow's milk. Reactions in this family can include anaphylaxis. For label reading, the practical habit is to treat casein, caseinate, sodium caseinate, and milk protein as the same entry, and to read the full ingredient list even when the front of the package says non-dairy. Logging the specific wording you find helps you recognize it faster next time.