Tartaric Acid (Wine Processing) — Hidden Processing Agent — Is It Vegan?
Also known as: L-tartaric acid, E334, Cream of tartar precursor
Vegan
No animals or animal-derived substances are involved in producing this agent.
Not required on labels
E334 when used as a direct ingredient. In winemaking, it is a processing addition that may not appear on the label.
Source
Extracted from grape pomace (the solid waste from wine production), primarily from byproduct of Italian and Spanish wine industries. Entirely plant-derived from grapes.
Used In
Wine acidification (correcting low-acid musts), cream of tartar production (potassium hydrogen tartrate), baking powder, some food acidulants.
How to Avoid
No need to avoid — tartaric acid is vegan.
Editorial Notes
Tartaric acid is unique among food-grade acids in being commercially derived almost exclusively from grape pomace — a genuine circular economy story from the wine industry. Cream of tartar is potassium hydrogen tartrate, a naturally occurring byproduct that crystallises on the inside of wine barrels and casks.