Fish oil supplements and dietary fish have seen an increase in usage over the past decade.

Fish oil is the oil from the tissues of fish and contains omega-3 fatty acids that help normalize your metabolism, lower your blood pressure, slow the development of plaque in your arteries and reduce the risk of heart attack and stroke.

Omega-3's also contain eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).

Even though fish oil seems to be popping up all over your grocery and health food stores, there are still many concerns surrounding fish oil and what form is best.

Eating food in its most natural state is the best way to get the most nutrients. In this case, it would be from the fish itself and the form would be triglycerides.

Triglycerides are a lipid fat found in your blood. When you eat, the calories (or energy) your body doesn't need at the moment is stored away as triglycerides.

However, even though triglycerides are the best, natural form of omega-3 fatty acids, they aren't the most popular. The cheaper and most popular form is ethyl ester.

What problems could this cause for your health in the long run?

Dr. Holly compares ethyl ester and triglycerides and explains why you should be aware of the forms of omega-3 fatty acids so you know what you are putting into your body.