Source dependent

The source or production method of dehydrated sourdough can vary, so it is not always vegan.

Names you may see on a label

levain secdehydreret surdejkuivattu taikinajuurizakwas w proszkuSauerteig getrocknetlievito naturale seccolevain déshydratésproszkowany zakwas

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.