A fatty acid reaction typically involves the chemical processes where fatty acids, which are long-chain hydrocarbons, interact with other molecules. These reactions can include esterification, where fatty acids react with alcohols to form esters, or saponification, where they react with bases to produce soap. These processes are essential in the production of various products, including biodiesel and food items. In biological systems, fatty acid reactions play a crucial role in metabolism. Enzymes facilitate the breakdown of fatty acids through processes like β-oxidation, converting them into energy. This energy is vital for cellular functions and is stored in the form of triglycerides in adipose tissue.