What makes red wine red?
Red wine gets its color from the skins of red grapes (like white grapes, the flesh of red grapes is greenish, with one or two rare exceptions). As with white wines, grapes are harvested and crushed, but then the winemaker allows the grape juice to ferment in contact with the skins for days or even weeks, drawing out the polyphenols and tannins that produce color and structure. Then, also unlike most whites, red wines are usually aged for a year or two before being bottled (classically in oak barrels) to soften their roughness and astringency.
What makes red wine healthy?
There’s strong evidence that drinking red wine in moderation is good for your health. Researchers have suggested for years that the antioxidants found in red wines may help reduce the risk of heart disease. More recently, scientists have linked the specific antioxidant resveratrol to the formation of nerve cells, which may be useful in preventing Alzheimer’s and Parkinson’s. There’s even some tentative evidence that, thanks to resveratrol’s benefits, red wine may prolong life.
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People decant red wines for two main reasons. First, older reds tend to have gritty, bitter sediment in the bottle. To decant, let the bottle rest upright for a few hours so the sediment can settle at the bottom, then pour the wine out. Second, decanting a young, tannic red—Cabernet Sauvignon, Syrah, Petite Sirah—exposes it to oxygen, which helps soften texture and accentuate aromas (just pulling the cork won’t do this). And an expensive decanter isn’t necessary—a clean glass pitcher works perfectly well.
Without acidity (tartness), red wines would taste dull and alcoholic. Plus, acidity helps red wines age successfully.
Oak barrels soften young red wines by exposing them to oxygen. New oak barrels also impart vanilla, caramel or spice flavors.
Tannins are astringent substances from the skins, stems and seeds of grapes. They balance fruitiness in young wines and help wines age. Cabernet Sauvignon is usually quite tannic; Pinot Noir, less so.
© David Prince