What is the primary source of tannins in red wines?

What is the primary source of tannins in red wines?

• A. From oak barrels used in aging.
• B. From minerals in soil.
• C. From grape skins and seeds during maceration, with additional contributions from oak aging.
• D. From fermentation yeast.

Answer: (C)

Tannins in red wine mainly come from the grape itself—specifically the skins and seeds. During maceration, when the juice ferments with the grape solids, tannins located in the skin and seed tissues are leached into the wine, contributing structure, grip, and aging potential. The length and intensity of skin contact influence how much tannin is extracted: longer, warmer maceration generally yields more tannin and color compounds, while shorter contact gives lighter tannin levels. Oak aging adds additional tannins as the wine rests in wooden barrels, but these wood-derived tannins are supplementary to the grape tannins and can vary with barrel type, toast level, and aging duration. The soil itself does not provide tannins, and fermentation yeast do not contribute tannins. So the primary source is the grape skins and seeds during maceration, with extra tannins coming from oak aging.

Tannins in red wine mainly come from the grape itself—specifically the skins and seeds. During maceration, when the juice ferments with the grape solids, tannins located in the skin and seed tissues are leached into the wine, contributing structure, grip, and aging potential. The length and intensity of skin contact influence how much tannin is extracted: longer, warmer maceration generally yields more tannin and color compounds, while shorter contact gives lighter tannin levels.

Oak aging adds additional tannins as the wine rests in wooden barrels, but these wood-derived tannins are supplementary to the grape tannins and can vary with barrel type, toast level, and aging duration. The soil itself does not provide tannins, and fermentation yeast do not contribute tannins.

So the primary source is the grape skins and seeds during maceration, with extra tannins coming from oak aging.