Does dandelion root help with blood pressure? What the research does and doesn't show

No human trial has tested dandelion root's effect on blood pressure, at any dose or in any form. The two closest animal studies don't fill that gap either: both measured other things — heart-muscle pressure in an isolated organ, and antioxidant markers in tissue — not blood pressure itself in a living animal.

What the evidence doesn't support

It doesn't support drinking dandelion root tea, or taking a dandelion root supplement, to lower blood pressure. No human trial has measured blood pressure before and after dandelion root use, in people with normal or high blood pressure. It also doesn't support the common assumption that "dandelion is a diuretic, and diuretics lower blood pressure, so dandelion must lower blood pressure" — that chain of reasoning skips a step no trial has tested for dandelion specifically, and the one human trial of dandelion didn't measure blood pressure at all (see below).

What the trials found

A 2023 study gave Wistar rats either tap water or freshly boiled dandelion root daily for four weeks, then isolated their hearts and measured pumping function under artificial, controlled perfusion, along with blood markers of oxidative stress. Dandelion root didn't harm the isolated heart's pumping function, but it also wasn't associated with any improvement in the animals' oxidative-stress markers. Critically, this study measured left-ventricular pressure in a heart removed from the body and perfused in a lab apparatus — not blood pressure in a living, intact animal.

A separate study induced hypertension in rats using a drug (L-NAME), then gave them dandelion leaf or root extract (500 mg/kg/day) for 21 days and measured antioxidant capacity and an oxidative-damage marker in organ tissue. Both the leaf and root extract raised antioxidant markers and lowered the damage marker compared with untreated hypertensive rats — a real finding, but again not a blood pressure reading. The published abstract for this study reports oxidative-stress markers only; it does not report whether the rats' blood pressure itself changed.

The one human trial of dandelion, often cited as evidence for a diuretic effect, gave 17 healthy adults a liquid dandelion leaf extract three times over a single day and tracked how often they urinated — not their blood pressure. See dandelion root benefits: what the research does and doesn't show for the full context of that trial.

Questions people ask

Does dandelion root tea lower blood pressure?

No human trial has tested this. The closest animal research measured oxidative-stress markers and isolated heart function, not blood pressure readings, so there's no direct evidence either way for tea or any other form.

Can dandelion root raise blood pressure?

No trial has reported that either. The available animal research didn't measure blood pressure as an outcome, so neither a lowering nor a raising effect has actual trial support.

Is dandelion root good for high blood pressure?

That's not a question the current research can answer. No human trial has measured dandelion root's effect on blood pressure, and the animal studies that exist measured different things (oxidative stress markers, isolated heart-muscle pressure), not blood pressure itself.

When to talk to a doctor

Dandelion root is not a treatment for high blood pressure, and it shouldn't replace or delay a blood pressure medication or a doctor's monitoring. If you take medication for blood pressure, ask your doctor or pharmacist before adding dandelion root — its diuretic and other studied effects (mostly from lab and animal research) could plausibly interact with how your body handles fluid and blood pressure, even though no trial has tested that combination directly. See dandelion root and medications: what to check.