Omega-3 fatty acids are a group of fatty acids present in every cell of the body. Fish, fish oil and some rapeseed oil are good sources of this fatty acid. Today, there are a large number of studies supporting the role of omega 3 in infant development, cancer prevention, brain function, arthritis and other diseases. Because the human body cannot produce omega-3 fatty acids on its own, it can only rely on food to supplement it. You can consider adding these top foods rich in omega-3 fatty acids to your food list to avoid omega-3 deficiency.