Question: what are the ingredients in red wine?
Answer: Calcium carbonate. Calcium carbonate is used to reduce the acidity of the finished wine, and is sometimes added if the grapes have had trouble ripening. ... 
Flavours. ... 
Grape juice concentrate. ... 
Non-vegan material. ... 
Powdered tannins. ... 
Potassium sorbate and potassium metabisulfite. ... 
Sulfur dioxide. ... 
Sugar.