I would have thought that all wine was vegan. I guess not. From;

http://en.wikipedia.org/wiki/Vegan_wine

"Wineries might use animal-derived products as finings. To remove proteins, yeasts, and other organic particles which are in suspension during the making of the wine, a fining agent is added to the top of the vat. As it sinks down, the particles adhere to the agent, and are carried out of suspension. None of the fining agent remains in the finished product sold in the bottle, and not all wines are fined. All Kosher wines are vegan.

Examples of animal products used as finings are gelatin, isinglass, chitosan, casein and egg albumen. Bull's blood is also used in some Mediterranean countries but is not allowed in the U.S. or France.

As an alternative to the animal products Bentonite, a clay mineral, can be used to clarify the wine. There are even some very patient vintners who let the wine's sediments settle naturally. Winemakers are not required to put on their label which clarifier is used, since it is removed from the final product. However, some wine makers will boast on the wine label that their wine is unfiltered, because some wine connoisseurs prefer wine to be unfiltered."

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