Check out this disturbing little tidbit I found on VegNews:

“What’s difficult for vegans to swallow is that the majority of fining agents used in wines today are derived from animals. These agents include isinglass (from sturgeon bladders), gelatin (from boiled cows’ or pigs’ hooves and sinews), egg whites (or albumen), and casein (a milk protein). Even bulls’ blood, “sangre de toro,” was once used to clear red wine, but no longer in American or European wineries—Mad Cow Merlot just wouldn’t sell.”

Ew. For the full story, along with some vegan wine options, click here.