Salmon oil contains omega 3 fatty acids - an excellent source to boost up HDL (the Good cholesterol) in your blood . Omega 3 fatty acids in salmon oil, indeed, is a type of polyunsaturated fatty acids which can only be supplied by food sources. A study chaired by Gary J. Nelson, Ph.D., of the U.S. Dept of Agriculture's Western Human Nutrition Research Center in San Francisco, showed that HDL increased by 10% by just eating 20 days of a high salmon diet!