Michigan Technological University conducted a study with 67 healthy volunteers between the ages of 20 to 25years. The participants were given nine grams of fish oil pills or nine grams of olive oil as a placebo and were screened for blood pressure, heart rate and other related analysis. At the end of the test period, both groups of participants took an arithmetic test which is similar to a test administered on day three. This test involved addition and subtraction of numbers in their head while their stress response was being measured.
Those in the fish oil group showed blunted heart rate reactivity while they were stressed compared to those who took olive oil. Similarly, the total muscle sympathetic nerve activity reactivity to mental stress was also blunted in the fish oil group. There was not much difference between the two groups at rest.
The authors of this study revealed,
8 weeks of fish oil supplementation significantly reduced both HR and total MSNA reactivity to mental stress and generated a paradoxical blunting of calf vascular conductance. These findings support and extend the growing evidence that fish oil may have positive health benefits regarding neural cardiovascular control in humans.
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