a liquid. Chitosan , in combination with&nbsp; bentonite ,&nbsp; gelatin ,&nbsp; silica gel , isinglass , or other&nbsp; fining agents &nbsp;is used to&nbsp; clarify &nbsp; wine ,&nbsp; mead , and&nbsp; beer . Added late in the brewing process, chitosan improves&nbsp; flocculation , and removes yeast cells, fruit particles, and other detritus