Bietensap verlaagt de (bovendruk) bloeddruk

Research Question:
Diets that contain foods that are rich in inorganic nitrate, are associated with low blood pressure. However, the evidence for the blood pressure lowering effects of inorganic nitrate and beet in randomized clinical trials is not systematically examined. It was therefore carried out this review article.

The consumption of inorganic nitrate and beet juice lowers blood pressure?

Study Design:
This overview article contained 16 crossover studies between 2006 and 2012 with 254 participants. The study size ranged from 7 to 30 participants and the study duration ranged from 2 hours to 15 days.

The random effects model was used.

Results and conclusions:
The researchers found that consumption of inorganic nitrate and beet juice the systolic blood pressure (systolic blood pressure) significantly with 4.4 mmHg [95% CI =-5.9 to-2.8), p 0.001] reduced and the diastolic blood pressure (underpressure) not significant with 1.1 mmHg [95% CI =-2.2 to 0.1, p = 0.06] reduced.
Significant is, there is a link at a 95% reliability.
Not significant is, there is no link to a 95% reliability.

The meta-regression also allowed a connection between the daily dose (quantity) of inorganic nitrate and changes in systolic blood pressure [p 0.05] see.

The researchers concluded that the consumption of inorganic nitrate and beetroot juice reduced systolic blood pressure. However, these results should be tested in long-term studies and in individuals with increased risk of heart disease.

Original title:
Inorganic Nitrate and beetroot Juice Supplementation Reduces Blood Pressure in Adults: A Systematic Review and Meta-Analysis by Siervo M, Lara J, [...], Mathers JC.


Additional information about El Mondo:
In a crossover study examined persons are divided into two groups. The first group receives first treatment A and then treatment B, while the second group is treated in reverse order. The advantage of a crossover study is that the intermediary variation (= one person is not the other) is lost. This causes the found results more reliable.

The beet juice contained about 0.2 grams of nitrate. Read more about nitrate-rich vegetables (page 9 of presenting food groups). The nitrate is converted to nitrite and nitrite in the stomach will be converted into nitric oxide (NO). The nitric oxide causes the blood vessels to dilate and open the blood pressure becomes lower.

Find out how you can reduce your blood pressure.