The primary function of fatty acids is to serve as a source of energy for the body. As essential components of lipids, fatty acids are involved in forming cell membranes and storing energy in adipose tissues. They play key roles in metabolic processes, acting as signaling molecules and precursors to bioactive compounds. Additionally, fatty acids are critical for maintaining cellular structure and function, influencing membrane fluidity and integrity. The balance of different types of fatty acids in the diet is also important for overall health.