Fatty acids are key building blocks for a healthy brain, as the brain needs fatty acids from healthy fats to produce brain cells. Fatty acids form the membranes surrounding brain cells, allowing nutrients to pass in and waste to pass out. A diet rich in essential fatty acids supports proper brain nutrition and function. Omega-3 and omega-6 fatty acids are essential fatty acids that must be obtained through diet, as the body cannot produce them. These fatty acids are important for brain development and function throughout life. Deficiencies can impact birth weight, head size, and later brain development and function. Maintaining proper nutrition supports optimal brain health.