Omega 3s are a type of essential fatty acid. Just like essential vitamins and minerals, omega 3s are considered to be essential because we need to consume them through our diets.. Omega 3 fatty acids are involved in several biological processes that include metabolic signaling, inflammatory response, and brain function. Additionally, omega 3 fatty acids are a critical component of cell structure, as they are incorporated into the cellular membranes of nearly all tissues in the body.