What are tannins in wine? 🤔 Wine tannins are naturally occurring compounds released into the wine during the winemaking process. They are found in the grape skins, seeds, and stems, but they can also be added by using oak barrels during aging. Tannins are responsible for that dry, puckering feeling in your mouth. Red wines like Syrah, Cabernet Sauvignon, and Nebbiolo have more tannins. These wines complement rich food, making them a popular choice when paired with red meat and cheese. #WineLove