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# Fish oil, soy food lower blood pressure
- URL: https://www.foodconsumer.org/fish_oil_soy_food_lower_blood_pressure_1105120628/
- Published: 2012-11-05T19:27:00.000Z
- Updated: 2026-09-22T16:01:34.000Z
- Description: In a small 90-day trial of 65 women with metabolic syndrome, those taking both 3 g of fish oil and 29 g of soybean kinako daily lowered systolic and diastolic blood pressure from baseline. Adiponectin and nitric oxide rose in the fish oil and soy groups.
- Author: Food Consumer
- Tags: Food, Nutrition, #vivvo-import

By David Liu, PHD

Monday Nov 5, 2012 (foodconsumer.org) -- Taking fish oil supplements or eating soy foods can help lower blood pressure (BP) in women with metabolic syndrome, according to a trial published in British Journal of Nutrition.

Andréa Name Colado Simãoa of University of Londrina, Londrina, Paraná, Brazil and colleagues conducted the study and found women with metabolic syndrome receiving a 90-day supplementation of fish oil or soy food had reduced their blood pressure, compared to the blood pressure at baseline.

Enrolled in the small trial were 65 women aged 47.9 years who were assigned to receive a control diet, or 29 grams of soybeans (kinako) per day, or 3 grams of fish oil per day, or both 3 grams of fish oil and 29 grams of kinako per day for a period of 90 days.

Outcomes of the trial included anthropometric parameters, blood pressure, inflammatory markers, anti-inflammatory marker, adiponectin and nitric oxide (NO) concentrations.

Compared to the values at baseline, those who received fish oil and kinako concomitantly experienced a statistically significant decrease in systolic blood pressure as well as a significant decrease in diastolic blood pressure after 90 days of supplementation.

Adiponectin and nitric oxide values increased significantly in subjects who received either kinako and or fish oil at the end of the 90-day supplementation.

The researchers concluded "findings of increased serum adiponectin and NO metabolite levels after 90 d, both in the fish oil and soya groups, reinforce the importance of the influence of adiponectin and NO levels on BP decrease in patients with the MetS (metabolic syndrome)."

Adiponectin is a protein hormone that is involved in regulating glucose metabolism and fatty acid oxidation. A higher level of this hormone is linked to low adiposity. Apparently, high levels of adiponectin helps metabolic syndrome.

High levels of nitric oxide help relax the blood vessels and help reduce blood pressure. Fish oil is known to have an antihypertensive effect. People with high blood pressure may consider taking fish oil supplements, eating garlic, and vitamin C among other things to help control blood pressure.