Daily Nut Consumption Linked to 20% Lower High Blood Pressure Risk, Study Finds

Consuming a moderate daily portion of nuts can significantly lower the risk of developing high blood pressure, a recent meta-analysis suggests.

The comprehensive study, which integrated data from over 143,000 adults, revealed that individuals who eat 28 grams of nuts daily experience a reduction in their risk of hypertension by as much as 20%.

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Daily intake of an additional 28 grams of nuts, which is one serving in nutritional terms, can reduce the risk of high blood pressure by 20%.

This finding comes from a meta-analysis published in the British Journal of Nutrition, which examined eight prospective cohort studies. The research tracked participants over time, identifying 20,665 individuals who were diagnosed with high blood pressure.

The analysis indicates a clear dose-response relationship, but with a plateau effect. The greatest benefits were observed around the 25 to 30-gram mark, with no additional advantages gained from consuming larger quantities. Researchers estimate that consuming 30 to 35 grams of nuts daily could lower hypertension risk by 26% compared to those who eat no nuts, suggesting this is the optimal intake range.

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The dose curve flattens around 25 to 30 grams per day, and increasing the amount further does not yield additional benefits.

Nuts contain various phytochemicals beneficial for blood pressure regulation, including magnesium, potassium, and L-arginine. Magnesium acts similarly to a natural calcium channel blocker in blood vessel smooth muscles, while potassium aids in sodium excretion by the kidneys. L-arginine, found in walnuts, peanuts, and almonds, is a precursor for nitric oxide synthesis, a crucial molecule that promotes blood vessel dilation.

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Magnesium acts similarly to a natural calcium channel blocker in blood vessel smooth muscles; potassium helps promote kidney sodium excretion; L-arginine, rich in walnuts, peanuts, and almonds, is the raw material for the body to synthesize nitric oxide, and nitric oxide is the key signal that relaxes blood vessels.

According to Taiwan's National Health Administration guidelines, a daily serving of nuts and seeds is recommended, approximately 7 to 10 grams. The study's recommended intake of 28 grams is about three times this amount, roughly equivalent to a palmful for an adult.

However, experts advise choosing unsalted nuts. Salt-roasted varieties can contain over 300 milligrams of sodium per 100 grams. Consuming high amounts of sodium while trying to increase intake of beneficial minerals like magnesium and potassium could negate the positive effects on blood pressure control.

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Salt-roasted nuts can contain over 300 milligrams of sodium per 100 grams. If you consume a lot of sodium in order to obtain nutrients like magnesium and potassium from nuts, it would be a wasted effort for blood pressure control.