What is the biological function of unsaturated fats?

Unsaturated fats play several crucial biological roles, primarily serving as a source of energy and essential fatty acids that the body cannot synthesize. They contribute to cell membrane fluidity, allowing membranes to remain flexible and functional. Unsaturated fats also participate in signaling pathways and help reduce inflammation, which can benefit cardiovascular health. Additionally, they are important for the absorption of fat-soluble vitamins (A, D, E, and K).