Isinglass is used, but it isn't an ingredient - it's more like a flux, something for suspended yeast and proteins to get stuck to so it will settle out. That do

Isinglass is used, but it isn't an ingredient - it's more like a flux, something for suspended yeast and proteins to get stuck to so it will settle out. That doesn't mean that vegan types shouldn't object to its use, but it doesn't remain part of the wine (it can only be found in the dregs).