Source dependent

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

Names you may see on a label

aroma di limoneZitronenAromaaromat cytrynowycitronaromcitroenaromasitruuna-aromisabor a limónarôme de citronarôme citronodeur de citronaroma de limonlemon scent

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.