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02.04.2022


A few spirulina tablets a day lower your blood pressure by 4 to 5 points

Supplementation with the microalgae spirulina can lower both systolic blood pressure and diastolic blood pressure by more than 4 points. Polish scientists come to that conclusion in a meta-study published in Nutrients.


A few spirulina tablets a day lower your blood pressure by 4 to 5 points


Study
Epidemiologists from the Medical University of Lublin collected 5 human studies into the effect of spirulina supplementation on blood pressure, in which a total of 230 subjects participated.

The doses tested ranged from 1 to 8 grams of spirulina per day. The duration of administration ranged from 2 to 12 weeks.

Spirulina contains ingredients that can lower blood pressure in animal experiments. Phycocyanin is one of them. Phycocyanin can indirectly increase the activity of nitric oxide in arterial walls, making them more flexible and theoretically reducing blood pressure. With their meta-study, the Poles wanted to find out whether this also works in humans.

Results
Spirulina supplementation reduced systolic blood pressure - the upper pressure during and just after contraction of the heart muscle - by 4.6 points.

Click on the figure below for a larger version.


A few spirulina tablets a day lower your blood pressure by 4 to 5 points


Doses greater than 2 grams per day, and spirulina cycles longer than 12 weeks appeared to be more effective than smaller doses and shorter courses at first sight, but these differences were not statistically significant.

Spirulina supplementation reduced diastolic blood pressure - the blood pressure between two contractions of the heart muscle - by 4.3 points.

Click on the table below for a larger version.


A few spirulina tablets a day lower your blood pressure by 4 to 5 points


In their meta-analysis, the researchers used a 'difficult' study. When the Poles omitted that study, spirulina was found to suddenly lower diastolic blood pressure by 7 points. That is the number the Poles mention in their abstract.

Kinda cheating.

Conclusion
"Spirulina administration might have a supportive effect on the prevention and treatment of hypertension", write the Poles. "More exact randomized controlled trials are needed to clarify the effect of spirulina supplementation on blood pressure."

Source:
Nutrients. 2021 Aug 31;13(9):3054.

More:
Blood pressure drops several points during supplementation with Pycnogenol 28.02.2022
Chia lowers blood pressure (but that's not all) 03.05.2020
Combination of strength training with fish oil supplementation lowers blood pressure 18.02.2020

Archives:
Cardiovascular Health
Spirulina
Algae


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