August 17, 2017 โ Are you getting enough omega-3s? These vital fats are beneficial for heart, brain and eye health, but itโs not just the amount that matters. The type of omega-3s in your diet could determine the health benefits youโre getting โ especially if you donโt eat fish.
Long-chain omega-3 fatty acids called EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) are found in marine sources such as fatty fish and fish oils. Another type of omega-3s is ALA (alpha-linolenic acid), which is found in plant sources such as flax seeds, canola, chia and walnuts.
Most Americans arenโt getting enough EPA and DHA. Thatโs of concern because there is strong evidence that these omega-3s reduce triglyceride levels to help lower the risk for heart disease or heart attack. There is some evidence that these healthy fats may also reduce blood pressure and improve blood vessel function. And those are just some of the heart-health benefits. The evidence for these benefits in ALA isnโt as strong.
Penny Kris-Etherton, distinguished professor of nutrition at Pennsylvania State University, points out that, โWe really havenโt seen evidence for benefits of plant omega-3s on cognition or in preventing stroke.โ
Bruce Holub, professor at The University of Guelph adds, โEPA and DHA are shown to be quite effective at lowering triglyceride levels in the blood, while equal amounts of ALA had no effect.โ
Getting enough DHA is especially important for pregnant women because itโs essential for healthy development of a babyโs brain and eyes.