Review demonstrates DHA’s effect on blood pressure

Fish Oil for blood pressure

Fish oil supplementation: benefits for cardiovascular health

Health care providers recommend fish oils to help improve LDL particle size and lower triglycerides, for their anti-inflammatory properties, and simply for overall health, since these fats are essential for the normal function of all of our cells.

Essential fatty acids to lower blood pressure

Essential fatty acids have been shown to lower blood pressure; however, the independent effect of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on blood pressure has previously been unclear. In a published study, researchers were able to demonstrate the effect of DHA on blood pressure.

In this study, 86 individuals were recruited to participate in a 12-week, randomised, double-blind trial examining the effects of supplementation with 3 grams per day of EPA, DHA, or olive oil on resting hemodynamics and muscle sympathetic nerve activity (MSNA). Both EPA and DHA supplements increased the Omega-3 Index; however, reductions in systolic and diastolic blood pressure were greater following DHA and olive oil compared to EPA. There was also an increase in heart rate in EPA supplementation compared to DHA and olive oil, and MSNA burst frequency was higher following DHA.

Support for healthy blood pressure levels

As a result, DHA and olive oil had a similar effect on blood pressure but DHA also increased peripheral vasoconstrictor outflow. These results demonstrate that DHA supplementation is beneficial for supporting healthy blood pressure levels, especially in those with chronic high blood pressure and sympathetic over-activation.

A previous review also showed the benefits of DHA supplementation on cardiovascular health. In this review, a total of 51 randomised controlled trials with 3000 individuals were included. When compared to placebo, omega-3 fatty supplementation minimally reduced heart rate. However, when DHA and EPA were separately consumed, a modest reduction in heart rate was seen in studies that supplemented with DHA and not with EPA.

There are limited natural agents that can effectively reduce blood pressure and heart rate. While previous research has shown a slight reduction in heart rate with essential fatty acid supplementation, there has been a growing body of research investigating the individual effects of EPA and DHA on heart rate specifically.

Nutrition for hypertension

In addition to omega-3 fatty acids with fish oil supplementation, clinicians may want to consider magnesium, taurine, potassium, and CoQ10 when working with hypertensive patients.

By Michael Jurgelewicz, DC, DACBN, DCBCN, CNS

Source: Lee JB, Notay K, et al. Docosahexaenoic acid reduces resting blood pressure but increases muscle sympathetic outflow compared to eicosapentaenoic acid in healthy men and women. Am J Physiol Heart Circ Physiol. 2019 Feb 8. ​