If you are considering taking a fish oil supplement because you are at higher risk for heart disease or stroke, a statin drug is a much better studied mechanism to reduce that risk. If your triglycerides remain elevated despite statin therapy, then Vascepa is a good idea if you fall into a high-risk group. I would recommend Vascepa, in this instance, rather than an over-the-counter fish oil supplement, due to the good-quality evidence of benefit and the concern that some brands of OTC supplements are not of excellent quality.
To Your Good Health: Very high triglycerides may need a step up from OTC fish oil | Columnists

Eating fatty fish, such as salmon, one or two servings a week gives many of the benefits of fish oil supplementation.
DEAR DR. ROACH: My husband is 55 years old. He was in the hospital about a year ago for a mild heart attack. At the time, a urine test was performed and a small amount of blood was detected in