Source dependent

The source or production method of hydrolysed milk protein can vary, so it is not always vegan.

Names you may see on a label

hydrolizat białka mlecznegoMilchproteinhydrolysatproteine de latte idrolizzatehydrolyseret mælkeproteinproteína de leche hidrolizadagehydroliseerd melkeiwithydrolyserat mjölkproteinprotéine de lait hydrolyséehydrolysoitu maitoproteiinihydrolysiertes Milcheiweißhydrolysiertes Milcheiweissmaitoproteiinihydrolysaatti

How to verify it

Look for a vegan certification or a manufacturer statement identifying the original source. The ingredient name alone does not settle it.