Acetic acid is a key component that contributes to the complex flavour profile of wine, recognized primarily for imparting a vinegary taste when present in high concentrations. Naturally occurring through the fermentation process, it is essential in small amounts for the wine’s overall balance, adding to its character and depth. However, excessive acetic acid can lead to wine spoilage, resulting in an undesirable sharp, sour taste that overshadows the wine’s fruitiness. This balance is crucial for winemakers to monitor to ensure the wine remains enjoyable and true to its intended flavour profile.