The main function of omega-3 fatty acids in the diet is to support heart health and contribute to overall wellness. Omega-3s help reduce inflammation, improve blood circulation, and lower triglyceride levels, which are beneficial for maintaining healthy cholesterol levels. Additionally, omega-3 fatty acids are crucial for brain health, enhancing cognitive functions and potentially lowering the risk of neurodegenerative diseases. Sources include fatty fish, walnuts, and flaxseeds, making these nutrients essential for a balanced diet and optimal health.