Source dependent

lactose-containing Galacto-oligosaccharides is recognized, but its vegan status has not been verified in the local ingredient taxonomy.

Names you may see on a label

lactose containing galacto oligosaccharidesGalatto-oligosaccaridi di lattosioGalactooligosaccharide aus LactoseGalacto-oligosaccharides - issus du lactose

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.