Can Celery Juice Lower Your Blood Pressure? | The Evidence

Limited research suggests celery juice may modestly support lower blood pressure management, but it should not replace prescribed medication or lifestyle.

Celery juice has become a popular morning ritual, often framed as a cure-all for everything from inflammation to hypertension. That reputation traces back decades—an old folk remedy that, like many plant-based health claims, contains a kernel of truth but also a lot of wishful thinking.

The honest answer is more nuanced. While certain compounds in celery show real potential for blood vessel relaxation, the human evidence remains thin. A few small studies suggest a modest benefit, but large-scale trials are lacking. This article walks through what the science actually shows—and what it doesn’t.

How Celery Juice Could Affect Blood Pressure

Celery contains several bioactive compounds that, in theory, support healthy blood pressure. The most studied group is phthalides, particularly 3-n-butylphthalide (NBP). These compounds are believed to relax the smooth muscles lining blood vessels, which allows them to widen and reduce resistance to blood flow.

Beyond phthalides, celery also delivers dietary nitrates. The body converts these to nitric oxide, a molecule that naturally dilates blood vessels. Celery is also a good source of potassium, which helps counterbalance sodium’s effects on blood pressure. And it acts as a mild natural diuretic, potentially helping the body excrete excess sodium and water.

So the mechanisms are plausible. The question is whether the amounts in a typical glass of juice are enough to make a clinically meaningful difference.

Why The Celery Juice Hype Keeps Growing

Part of the appeal is the idea that a single, simple food can tackle a complex health problem like hypertension. The story is easy to remember—ancient remedy, modern validation—and it doesn’t require a prescription. But blood pressure is influenced by genetics, diet, activity, stress, and medications. No single juice overrides all of that.

• Phthalides (NBP): Animal and lab studies show these compounds relax blood vessel walls, lowering pressure in a dose-dependent way. Human data is promising but very limited.
• Dietary nitrates: Nitrate-rich vegetables like celery boost nitric oxide. The effect is real for beet juice; celery may work similarly, but it’s less studied for this purpose.
• Potassium content: A cup of celery juice provides roughly 300–400 mg of potassium—about 8–10% of the daily target for most adults. Helpful, but not a concentrated source compared to a banana or spinach.
• Natural diuretic effect: Celery contains compounds that promote urine output. This can temporarily lower blood volume and pressure, but the effect is mild and short-lived.

Each of these mechanisms is supported by at least preliminary research. The challenge is that they work best in combination with other dietary and lifestyle habits, not as a standalone fix.

What The Science Says About Celery Juice and Blood Pressure

The most direct human evidence comes from a 2021 study where participants with hypertension took 75 mg doses of celery seed extract (standardized to 85% NBP) twice daily. The results showed a significant decrease in blood pressure over the study period. That extract is much more concentrated than a glass of fresh celery juice, so the effect from whole juice is likely smaller.

Animal and Human Studies

Animal experiments dating back decades have consistently found that celery compounds lower blood pressure by relaxing smooth muscle. A 2019 conference paper reported that celery juice reduced both systolic and diastolic readings in people with systolic hypertension. A 2024 narrative review confirmed NBP as one of the most bioactive compounds for blood pressure management, but noted that large-scale, randomized controlled trials are still missing.

The takeaway from this body of research is that the effect exists but is modest. A 2021 study on phthalides relaxing blood vessels in humans is a step forward, but the field needs more robust trials before anyone can confidently recommend celery juice as a treatment.

None of these studies suggest celery juice alone is enough to treat hypertension. They point toward a potentially helpful addition, not a substitute for standard care.

How To Incorporate Celery Juice Safely

If you want to try celery juice as part of your routine, there are a few smart guardrails to keep in mind.

1. Start small: 4–8 ounces per day is a reasonable starting point. More is not better, and large amounts can upset your stomach or add significant sodium if you buy commercial juices.
2. Don’t stop your medication: Medical experts consistently warn against replacing prescribed blood pressure drugs with celery juice. The evidence is too limited to support that swap.
3. Monitor your response: Check your blood pressure at home before and after a few weeks of daily juicing. Everyone’s body responds differently, and some people may see little to no change.
4. Consider whole celery instead: Juicing removes fiber, which is beneficial for heart health in its own right. Eating whole celery stalks gives you both the phthalides and the fiber.

The key is to treat celery juice as one small piece of a broader approach that includes a balanced diet, physical activity, stress management, and any medications your doctor has prescribed.

Does Preparation Method Matter?

One lesser-known point is that how you prepare celery may influence its blood-pressure effects. Cooking alters the structure of some compounds, and at least one source suggests cooked celery could be more effective than raw for lowering blood pressure. The reasoning is that heat may release phthalides more readily, making them easier for your body to absorb.

Per the cooked vs raw celery guide, cooking (steaming or light boiling) may also increase the bioavailability of certain antioxidants. However, juicing raw celery is the more common practice and still delivers the beneficial compounds. The difference is likely small for most people.

No single preparation method has been proven superior in human trials. The best approach is the one you can stick with consistently, alongside other heart-healthy habits.

The Bottom Line

Celery juice may offer a modest, supportive effect on blood pressure, thanks to compounds like phthalides, nitrates, and potassium. But the evidence is still in its early stages—mostly small human trials and animal studies. For anyone managing hypertension, celery juice can be a healthy addition to a balanced diet, but it should never replace your doctor’s treatment plan.

If you have high blood pressure and are curious about adding celery juice, talk to your primary care doctor or a registered dietitian. They can help you fit it into your specific sodium, potassium, and medication goals without risking unwanted interactions or false hope.