Does vegetarian wine have a special label?
Not usually. However many supermarkets in the UK and Ireland at least label a lot of their own brand wines as “suitable for vegetarians” when appropriate. They don’t use a recognised vegetarian symbol, such as that of the Vegetarian Society. The existence of “suitable for vegetarians” on the label doesn’t mean that the wine either is or isn’t suitable for vegans. The lack of any mark of suitability signifies nothing either, as most wines are not marked for suitability at all.