Katie had an LDL of 87 mg/dl, HDL of 48 mg/dl, triglycerides of 201 mg/dl. By conventional standards, not too bad.

Reading about the heart health benefits of omega-3 fatty acids, Katie added fish oil. With the preparation she bought, 4000 mg per day provided 1200 mg the omega-3 fatty acids, EPA and DHA. Three months later her LDL was 118 mg/dl, HDL 54 mg/dl, triglycerides 92 mg/dl.

In other words, LDL cholesterol increased by 31 mg. What happened?

Several studies have, indeed, confirmed that...