Essential fatty acids (EFAs) are types of fats that the body cannot produce on its own, meaning they must be obtained through diet. The two main types of EFAs are omega-3 and omega-6 fatty acids. These fats play crucial roles in various bodily functions, including cell structure, hormone production, and inflammation regulation. Sources of essential fatty acids include foods like fish, nuts, seeds, and vegetable oils. A balanced intake of both omega-3 and omega-6 fatty acids is important for maintaining overall health, as they contribute to heart health, brain function, and skin integrity.