Omega 3 fatty acids are a class of essential polyunsaturated fatty acids that play a crucial role in cellular function. They are predominantly found in fish oils and some plant oils. The most important omega 3 fatty acids are alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). These fatty acids are vital for maintaining the structural integrity of cell membranes and facilitating cell signaling.