Those whose blood pressure was high to begin with benefited more and could benefit from consuming higher amounts of omega-3 fatty acids, the review showed. For people with high blood pressure, 3 grams of omega-3 fatty acids a day lowered systolic blood pressure by an average 4.5 mmHg. In those with normal blood pressure, the systolic number fell by 2 mmHg.
Analyzing data from 71 clinical trials published between 1987 and 2020, researchers examined the relationship between DHA and EPA – individually and combined – and blood pressure in nearly 5,000 adults with and without high blood pressure or cholesterol disorders.
The omega-3 fatty acids are commonly found in fishes such as salmon, tuna, sardines, trout, herring, and oysters, while also appearing in blended supplements.
According to the Food and Drug Administration, evidence that omega-3 fatty acids can help reduce high blood pressure or the risk for heart disease remains inconclusive. However, the agency announced in June 2019 it did find the evidence sufficiently credible for it to allow these claims on food and dietary supplements containing EPA and DHA.
“However, while our study may add a layer of credible evidence, it does not meet the threshold to make an authorized health claim for omega-3 fatty acids in compliance with FDA regulations.”