Volatile fatty acids (VFAs) are short-chain carboxylic acids (C1-C6) produced during fermentation and microbial metabolism. They are significant in food flavor, aroma, and preservation. Common examples include acetic, propionic, and butyric acids. VFAs contribute to the sour taste in foods and are used as preservatives and flavoring agents. They are highly soluble in water and alcohol, making them easily incorporated into various food products.