Essential fatty acids (EFAs) are polyunsaturated fats that the body cannot synthesize and must be obtained through diet. The two primary types are omega-3 and omega-6 fatty acids. EFAs play crucial roles in maintaining overall health, including supporting cell membrane integrity, reducing inflammation, and promoting brain function. They may also influence gut health by supporting the gut barrier and modulating the immune response. Foods rich in essential fatty acids include fatty fish (like salmon), flaxseeds, chia seeds, walnuts, and certain vegetable oils. Incorporating EFAs into the diet can enhance the effectiveness of probiotics by promoting a balanced gut microbiome.