Reply to "Exactly what's in wine besides grape juice and yeast?"

Mjraica, thanks for engaging in this dialog.

Orange juice naturally contains citric acid, but if additional citric acid is added, it must be listed in the ingredients.  Wine naturally contains sulfites, but if additional sulfites are added, the label should say so -- as the law requires.  Additives that are present in the finished wine -- flavorings, colorants, and preservatives -- are the first concern.  For additives that are removed or break down before bottling, these could be regulated and disclosed differently, but some items, like those of animal origin, could be important to vegans or others.

What government agency inspects additives like yeast nutrients or enzymes for purity, to make sure they don't have contaminants, or that they don't yield unintended byproducts?

There is a certain wine that famously has a "mint" or "menthol" note in the bouquet.  This is romantically attributed to a certain type of tree growing near the vineyard.  How do we know the winemaker isn't just adding add mint flavoring to the wine?

We need sensible full disclosure of what's in the bottle.  Including the glass.  What government agency makes sure it doesn't contain heavy metals that could leach into the wine?  I wouldn't drink wine at all if I wasn't confident that it was healthy in moderation.  Full disclosure would help with that reassurance.

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