Since our bodies do not produce their own Omega 3, so we need to get it from our diet. Omega-3 fatty acids are helpful in decreasing LDL cholesterol and total cholesterol levels. This effect is beneficial in various health conditions like heart diseases, diabetes and obesity. When Omega 3 passes through the digestive tract in the human body, it breaks down existing cholesterol and deposits a thin barrier to prevent its reformation. Omega-3 may also be a good nutrient for the brain and concentration. Omega-3 fats seem to work by making the thin fatty membranes that surround the nerve cells in the brain more flexible.