What is the role of sulfites in wine?

Sulfites play a critical role in preserving the quality of wine. Their primary function is to inhibit oxidation and prevent spoilage, which can occur due to exposure to oxygen or microbial contamination. By adding sulfites, winemakers can extend the shelf life of the wine, maintaining its freshness and desired characteristics. This preservation is particularly important in winemaking, as it allows wines to develop their flavors over time without being compromised by factors that lead to off-flavors or spoilage.

While sulfites can influence other aspects of wine production, such as helping to stabilize flavors, their main purpose is definitely geared towards preserving the wine's integrity. This explains why they are commonly used in both red and white wines to ensure that the end product remains enjoyable for consumers.