Omega-3 fatty acids

What are Omega 3 Fatty Acids?  

Omega-3 fatty acids refer to a group of fatty acids that can be found in every cell of the human body. It is composed of 3 types of unsaturated acids-EPA, DHA and ALA. These three acids play a vital role in our cells. They can affect the function of cells in the body, and can also heal or protect cells from damage caused by inflammation. So how to supplement Omega-3 fatty acids? What are the foods rich in omega-3?