Does beetroot juice really work against high blood pressure?
Yes, and surprisingly fast. But not in the way you hope: it is a real effect and a temporary effect, and that is exactly what makes it so instructive.
🩺 Written by K.Y.J.A.M. Ho, MD PhD, medical specialist · reviewed by C. Pleiter, medical specialist · published 27 July 2026 · updated 21 August 2026 · last medically reviewed 21 August 2026 · sources & method · how we make this
See the home experiment or go straight to the science
What happens after one glass
| Moment | What happens |
|---|---|
| 0 to 3 hours | Nitrate is converted (via mouth bacteria) into nitrite and nitric oxide; the vessels relax and the pressure falls to its lowest point |
| 3 to 6 hours | The effect persists but fades |
| After ±24 hours | Back at your baseline; only daily intake holds the effect |
This is the real value of beetroot juice: it shows you on your own monitor that your blood pressure is not a fixed number. Here is how to do it properly:
- Measure for three days at set moments (morning and evening, seated, after 5 minutes of rest, two readings each time): that is your baseline.
- Then drink a large glass of beetroot juice daily for three days and measure at the same moments, plus one extra reading 2 to 3 hours after the glass.
- Stop, and measure for two more days afterwards. Do you see the dip and the rebound? Then you have just seen with your own eyes that your blood pressure responds to lifestyle.
If you take blood pressure medication, read the warning box above first. This is an educational experiment, not a treatment or a diagnosis.
Want to do this experiment properly? We will send you the home measuring protocol: the right moments and posture, a record card for the beetroot juice experiment, and the rule for reading your own trend.
The lesson behind the glass
What beetroot juice does in hours, the big levers do lastingly: less hidden salt, more potassium and vegetables (which contain the same nitrate anyway, with fibre alongside) and weight loss. The glass is the demonstration; the pattern is the treatment. The full overview is at lowering blood pressure without medication.
The science, in full
For each claim, the evidence class and the source.
Acute effect: on average ±4 mmHg Moderate
A meta-analysis of randomised, mostly short studies found an average systolic drop of about 4.4 mmHg after inorganic nitrate or beetroot juice [1]. The studies were small and short, with mainly healthy or slightly raised participants; hence Moderate and not Strong.
Sustained with daily intake, in one trial Limited
In a four-week randomised study in people with hypertension, daily nitrate-rich beetroot juice kept blood pressure about 8 mmHg lower systolic (measured in clinic and at home), for as long as the intake continued [2]. One four-week study is not proof of a lasting effect, and there is no research on hard outcomes such as heart attack or stroke.
The mechanism: the nitrate-nitrite-NO pathway Strong
That dietary nitrate is converted via mouth bacteria and nitrite into nitric oxide, and that nitric oxide widens vessels, is extensively documented physiology [3]. Strong for the mechanism; the mechanism does not justify a treatment claim.
Frequently asked questions
How much beetroot juice would I have to drink for an effect?
In the studies it was usually about 250 millilitres (a large glass) a day, with the biggest effect a few hours after intake. Drinking more does not make the effect lasting; it fades as soon as you stop.
Is beetroot juice safe alongside blood pressure medication?
Usually yes, but the effects add up: together with medication the pressure can sometimes drop a little too far, with dizziness as the signal. Measure at home and discuss regular use with your doctor. Red urine or stools after beetroot is harmless.
Does it work equally well for everyone?
No. The conversion of nitrate into nitric oxide differs from person to person (partly because of mouth bacteria); some people see a clear dip, others almost nothing. Antibacterial mouthwash inhibits the conversion.
Would I not be better off just eating vegetables?
For the long term, yes: leafy greens and beetroot deliver the same nitrate plus fibre and potassium, within a dietary pattern whose effect on blood pressure is far better proven. The glass is a demonstration; the pattern is the treatment.
Does beetroot juice replace medication or lifestyle change?
No. There is no evidence that beetroot juice prevents cardiovascular disease, and the effect disappears as soon as you stop. See it as proof that your blood pressure is movable, and put the energy into the levers with a lasting effect.