Vegetable tannins are natural compounds found in various plants, particularly in the bark, leaves, and fruits. They belong to a larger group of compounds known as polyphenols and are responsible for the astringent taste in many foods and beverages, such as wine and tea. These tannins play a role in plant defense, helping to deter herbivores and protect against pathogens. In addition to their protective functions, vegetable tannins have several uses in human applications. They are commonly used in the food industry as preservatives and flavor enhancers. Moreover, they are utilized in the leather tanning process, where they help to preserve animal hides, making them more durable and resistant to decay.