I’ve seen EPA and DHA only formulas. How do these differ from a formula that has both EPA and DHA?
The answer is partly related to product benefits and to marketing. Eicosapentaenoic acid (EPA) plays a role in cardiovascular health whereas docosahexaenoic acid (DHA) plays a role in brain health. Formulas that are EPA specific are generally marketed as cardiovascular supplements and may also include other heart health nutrients like vitamin E and garlic. Formulas that are DHA specific are generally marketed as brain health supplements and may also include other brain nutrients like ginkgo biloba. Since these two fats are often found in nature in combination, it makes sense to supplement with both to ensure both cardiovascular and brain health.