What is the main function of tannins in wine?

Tannins play a crucial role in the overall profile of a wine, contributing significantly to its structure and aging potential. They are phenolic compounds found in grape skins, seeds, and stems, and their presence is particularly pronounced in red wines. One of their key characteristics is astringency, which can create a drying sensation in the mouth, influencing the tactile experience of the wine. This astringency balances the sweetness and acidity, adding complexity to the wine's flavor profile.

Moreover, tannins have the ability to stabilize color and contribute to the longevity of wines, allowing them to age gracefully over time. As a wine ages, tannins can soften and integrate, leading to a more harmonious and complex wine experience. In this context, their contribution to both the structure and the potential for development over time is invaluable for winemakers and enthusiasts alike.