Some breweries use isinglass (Isinglass is basically fish bladders, and whether you’re vegan or not you’d have to admit that it sounds fairly disgusting). It allows brewers to filter out excess yeast, and makes the liquid appear clearer. The isinglass bonds with the yeast, and drags it down to the bottom of the fermenter, where it’s easily extracted.
Here at UNLTD, we’re not fans of the fish mash. Our brewing process and ingredients are 100% plant-based!