When does red wine go bad?

Red wine doesn't really "go bad" in the same way milk does. It undergoes a process called oxidation, which changes its flavor and aroma over time. Here's a breakdown:

Factors Affecting Red Wine's Longevity:

* Quality: Higher-quality wines, made with better grapes and more careful winemaking, tend to age better.

* Storage: Proper storage is crucial. Darkness, cool temperature, and consistent humidity are essential.

* Type of Red Wine: Some red wines, like Cabernet Sauvignon and Merlot, are known for their aging potential. Others, like Pinot Noir, are best enjoyed young.

* Opening the Bottle: Once a bottle is opened, oxidation starts immediately. The wine's lifespan shortens dramatically.

Signs of Oxidation (and When It's Time to Toss):

* Flavor: The wine might taste "flat," "cooked," or have an unpleasant vinegar-like sourness.

* Aroma: The wine might have a stale or "oxidized" smell, like vinegar or wet cardboard.

* Appearance: The color might turn browner, and the wine may develop a cloudy or hazy appearance.

General Guidelines:

* Unopened Bottles: Most unopened red wines will last for several years if stored properly. Check the bottle's label for the "best by" date, but even if it's passed, the wine might still be enjoyable.

* Opened Bottles: An opened bottle of red wine will typically stay fresh for 3-5 days in the refrigerator. You can use a vacuum stopper to help slow down oxidation.

Important Note: If you're unsure about a wine's condition, it's always best to err on the side of caution. A small sip can tell you everything you need to know about whether it's still good.