Celery does appear to help lower blood pressure, and the evidence is more than folk wisdom. A 2025 meta-analysis of eight randomized controlled trials, covering 473 participants, found that celery significantly reduced both systolic and diastolic blood pressure compared to control groups. The effect isn’t dramatic enough to replace medication, but it’s real enough to make celery a smart addition to a blood pressure-friendly diet.
How Celery Lowers Blood Pressure
Celery works through at least two biological pathways. The first involves a compound called 3-n-butylphthalide, which is responsible for celery’s distinctive smell. This compound promotes the production of nitric oxide in the cells lining your blood vessels. Nitric oxide signals the smooth muscle in artery walls to relax, widening the vessels and reducing the pressure your blood exerts against them.
The second pathway comes from celery’s high nitrate content. At roughly 261 mg of nitrates per 100 grams, celery ranks among the most nitrate-rich vegetables, behind beetroot, radish, and lettuce but ahead of most other produce. Your body converts dietary nitrates into nitric oxide through a chain reaction that starts with bacteria on your tongue. This is the same mechanism that makes beetroot juice popular among athletes and people managing hypertension. The two pathways, the phthalide compound and the nitrates, both funnel toward the same result: more relaxed, wider blood vessels.
What the Clinical Evidence Shows
The most comprehensive look at celery’s blood pressure effects comes from a systematic review and meta-analysis published in Frontiers in Nutrition. Pooling data from randomized controlled trials, researchers found statistically significant reductions in both systolic blood pressure (the top number) and diastolic blood pressure (the bottom number) among people who consumed celery or celery-based products compared to those who didn’t. The diastolic result was particularly robust, with a p-value of 0.003, meaning the odds of that result being a fluke were very low.
One important caveat: animal studies suggest that celery’s blood pressure-lowering effects show up primarily in subjects that already have high blood pressure. In rats with normal blood pressure, celery seed extract didn’t produce a noticeable change. This makes sense biologically. If your vessels aren’t overly constricted, there’s less room for a relaxing compound to make a difference. For people already managing hypertension, though, this selectivity is actually good news: celery is unlikely to push blood pressure dangerously low.
How Much Celery to Eat
There’s no clinically established dose, which is one of the honest limitations of the research. The human trials used different forms of celery, including raw stalks, juice, and seed extract, at varying amounts, so pinning down an exact prescription isn’t possible yet. That said, a practical starting point based on the available data is roughly four stalks of celery per day, which gives you about 100 to 120 grams of the vegetable. This provides a meaningful amount of both nitrates and phthalides without requiring any dramatic dietary overhaul.
Juicing is another common approach. Blending two bunches of celery into juice concentrates the active compounds and makes them easier to consume in one sitting. The tradeoff is that you lose most of the fiber, which has its own cardiovascular benefits. Eating whole stalks gives you the full package: the blood pressure compounds, the fiber, and the potassium.
The Sodium Question
Celery has a reputation for being a “salty” vegetable, which raises a fair question for people watching their sodium. A full cup of chopped celery contains about 80 mg of sodium. For context, the American Heart Association’s recommended daily limit is 2,300 mg, and dropping to 1,500 mg per day produces even greater blood pressure reductions. Four stalks of celery contribute roughly 130 mg of sodium, which is a tiny fraction of either threshold. The potassium celery provides actually helps counterbalance sodium’s effects on blood pressure. The AHA’s latest dietary guidance specifically recommends combining lower sodium intake with higher potassium intake for blood pressure management, and vegetables like celery fit that strategy well.
Where Celery Fits in a Bigger Picture
The American Heart Association’s 2026 dietary guidance statement identifies whole or minimally processed vegetables and fruits as “core components of heart-healthy dietary patterns,” noting that these patterns are consistently associated with better blood pressure, blood lipids, and blood sugar control. The DASH diet, which was specifically designed to lower blood pressure, emphasizes generous vegetable intake as one of its foundations. Celery checks that box while offering compounds that most other vegetables don’t.
That said, no single food is a blood pressure solution on its own. The most effective dietary approaches combine multiple elements: plenty of vegetables and fruits, reduced sodium, adequate potassium, healthy body weight, and limited or no alcohol. The AHA’s latest blood pressure management guideline now recommends avoiding alcohol entirely for hypertension prevention and treatment, a stronger stance than previous versions. Celery is one useful piece of a larger strategy, not a substitute for the strategy itself.
Safety Considerations
For most people, eating celery in normal food amounts carries no meaningful risk. If you’re taking blood pressure medication, adding large amounts of celery or concentrated celery seed extract could theoretically amplify the blood pressure-lowering effect, so it’s worth monitoring your numbers and mentioning the change to your provider. Celery seed extract in supplement form is a more concentrated product than whole celery, and clinical dosing guidance for those supplements remains limited. Pregnant women are generally advised to avoid celery seed supplements, though eating celery as a food is not a concern. People with kidney disease should be aware that celery’s potassium content, while beneficial for most, could be relevant to their dietary restrictions.