Where to artificial tannins come from?

Question

When a wine maker adds artificial tannin to the wine because there isn't enough from the grapes themselves (many wineries routinely do this, though they will not readily admit it), where does this tannin come from?

Oops. That's "Where DO artificial tannins come from?"

Answer 1

The tannins that are added to wine are not necessarily 'artificial', but isolated from very natural sources. The majority of tannin is from oak. Other sources include grapes, chestnut, and gall nut. I've listed some tannin producers below if you want some more info...

Answer 2

Intriguing question.... my understanding was that winemakers regulate the amount of tannin in the wine by pressing the grapes harder or softer and letting the mush sit for more or less time before filtering the juice, since the grape tannins are mostly in the stems, seeds, and skin. Some tannins also come from the oak barrels, but I never heard about "artificial" tannins being added.

Answer 3

Grape Tannin. This is an ingredient found in abundance... guess where? In grapes. If you're making grape wine, especially red grape wine, you probably won't need to add much grape tannin, but some fruit wines and others require some grape tannin which aid in the clearing process. About 2-3 ounces are good to have around.

I guess the big grape growers have more than enough of it and they buy it from them