What Does Celery Do for Men?

Celery offers men a handful of real, documented biological effects, though fewer of them are as dramatic as social media wellness accounts suggest. The strongest human evidence points to blood pressure reduction, and there is preliminary research on fertility, gout, and prostate-related pathways. The catch is that much of the evidence comes from animal or cell studies, and the leap from a rat model to a man eating celery sticks is larger than most health content acknowledges. Understanding what the science actually shows, and where it stops, helps separate genuine benefits from wishful extrapolation.

Blood Pressure Is the Best-Supported Benefit

If there is one thing celery does for men with solid human trial data behind it, it is lowering blood pressure. A randomized, triple-blind, placebo-controlled clinical trial tested celery seed extract in people with hypertension and found that systolic blood pressure dropped from about 141 to 130 mmHg, while diastolic pressure fell from roughly 92 to 84 mmHg. Mean arterial blood pressure also dropped significantly.¹ Those are meaningful reductions, in the ballpark of what some first-line blood pressure medications achieve.

The compound most often credited is 3-n-butylphthalide (NBP), which is found naturally in celery and celery seed. A narrative review of celery’s antihypertensive properties describes a vasorelaxant effect that involves the nitric oxide pathway, meaning celery compounds help blood vessels relax and widen.² The exact mechanism is still debated, with some researchers finding the effect depends on an intact blood vessel lining and others suggesting non-endothelial pathways play a bigger role. Either way, the direction of the effect is consistent across studies.

For men specifically, this matters because high blood pressure is one of the most common chronic conditions in adult males and a leading driver of heart disease and stroke. It also directly connects to sexual health, a point covered below.

The Fertility and Testosterone Claims

Search “celery benefits for men” and you will quickly find claims that celery boosts testosterone, improves sperm count, and supercharges fertility. The reality is more modest. The research supporting these claims exists, but it is almost entirely from animal studies, and translating rodent reproductive findings to humans requires caution.

In one study, healthy male rats given aqueous celery leaf extract showed increases in the diameter of their seminiferous tubules (where sperm are produced), overall testes volume, and counts of various sperm cell stages. Sperm cell numbers went up across multiple stages of development, with the highest doses also boosting epididymal weight.³ A separate study looked at rats whose testes were damaged by a common industrial chemical (DEHP, a phthalate found in plastics). Celery oil partially reversed the drop in body and testicular weight, increased sperm count, raised serum hormone levels, and improved markers of oxidative stress in the testes.⁴

These are encouraging results in a controlled lab setting. But “celery extract boosted sperm parameters in rats” is not the same statement as “eating celery will improve your fertility.” Dosing in animal studies is often higher relative to body weight than what you would get from food, and human reproductive physiology does not always respond the same way. No published clinical trial has tested celery’s effect on sperm quality or testosterone in men. The fertility angle is plausible but unproven in humans.

How Vascular Health Connects to Erectile Function

One of the less-discussed but more practical connections for men is the relationship between blood vessel health and erections. Erectile function depends heavily on healthy blood flow. The same nitric oxide pathway that celery compounds appear to activate for blood pressure reduction is also the fundamental mechanism behind erections: nitric oxide signals the smooth muscle in penile arteries to relax, allowing blood to flow in. Drugs like sildenafil work by enhancing this same pathway.

No study has directly tested whether celery improves erectile function. But the vascular relaxation effects documented in the antihypertensive literature suggest a plausible indirect benefit.² A man whose blood pressure improves and whose blood vessels become more flexible is, broadly, a man whose circulatory system is working better everywhere, including in the tissues that matter for sexual performance. This is worth noting because erectile dysfunction often appears years before a heart attack or stroke, serving as an early warning of cardiovascular problems. Anything that genuinely improves vascular health has downstream relevance here, even if no one has run the specific trial yet.

That said, framing celery as a natural alternative to erectile dysfunction medication would be irresponsible. The effect size from dietary celery is going to be far smaller than from a pharmaceutical, and anyone experiencing persistent erectile problems should talk to a doctor rather than doubling their celery intake.

Gout and Uric Acid

Gout disproportionately affects men, with roughly three to four times higher prevalence in males than females. It is caused by uric acid crystals accumulating in joints, which happens when the body either produces too much uric acid or does not excrete enough. Celery seed extracts have shown genuine promise in this area.

In rodent models, celery seed extracts reduced serum levels of both uric acid and xanthine oxidase, the enzyme responsible for producing uric acid. The researchers attributed the effect partly to anti-inflammatory and antioxidant mechanisms.⁵ A deeper investigation into the chemistry identified specific flavonoids in celery seeds, including luteolin and chrysoeriol, that inhibit xanthine oxidase activity in a dose-dependent way. Among the compounds tested, chrysoeriol showed the strongest inhibitory effect.⁶

The mechanism here is the same one targeted by allopurinol, the standard pharmaceutical treatment for gout: blocking xanthine oxidase so less uric acid is produced. Celery seed is not going to replace medication for someone with clinical gout, but for men with borderline uric acid levels or a family history of gout, incorporating celery seed into the diet is a low-risk strategy with at least a plausible biological basis. Celery seed supplements and celery seed tea are the most concentrated forms; eating celery stalks provides some of the same compounds but in lower concentrations.

Prostate-Related Research

Apigenin, a flavonoid found abundantly in celery, parsley, and chamomile, has attracted attention in prostate cancer research. A recent laboratory study tested apigenin, both free and loaded onto selenium nanoparticles, against prostate cancer cells (the LNCaP cell line, which is androgen-sensitive). The nanoparticle-enhanced version produced the strongest suppression of androgen receptor signaling, reducing androgen receptor gene expression to about a quarter of normal and PSA protein to a tenth of baseline levels.⁷ Even free apigenin on its own reduced PSA gene expression.

This is interesting but very early-stage. A cell-culture study showing that a concentrated plant compound suppresses cancer-cell signaling does not mean eating celery prevents or treats prostate cancer. The doses used in cell studies are far higher than what dietary intake produces in human tissues, and many compounds that look promising in a petri dish fail completely in clinical trials. Still, the finding adds to a growing body of research on apigenin’s anti-cancer potential and explains why celery sometimes appears in lists of “prostate-healthy” foods.

Blood Sugar and Metabolic Health

The metabolic health story for celery is mixed, and honestly, this is where the evidence gets thin for humans. A clinical trial giving celery seed to human participants found no statistically significant differences in insulin sensitivity or insulin secretion.⁸ That is a null result worth paying attention to, because human trials override animal models when they contradict each other.

In contrast, a rat study using celery extract on fructose-induced insulin resistance found that treated animals had lower fasting blood glucose and improved insulin resistance markers compared to untreated controls, with increased expression of GLUT-4, a protein that helps cells absorb glucose.⁹ The disconnect between the animal result and the human trial is a useful reminder that positive findings in rodents do not always carry over. For now, there is no strong reason to believe celery meaningfully improves blood sugar control in people.

The one metabolic benefit that is harder to dispute is simply that celery is an extremely low-calorie vegetable, high in water and fiber. For men trying to lose weight or manage their metabolic health, celery is a useful tool in the most boring possible way: it fills you up without adding significant calories. That unglamorous fact probably matters more than any bioactive compound when it comes to day-to-day metabolic health.

Gut Microbiome Effects

Celery contains both soluble dietary fiber and flavonoids, and the interaction between these two components in the gut turns out to be surprisingly complicated. A mouse study examining colitis found that celery’s soluble dietary fiber and its flavonoids each had beneficial effects on gut bacteria when given separately. Flavonoids alone boosted populations of Akkermansia, a genus associated with gut health, from about 3% to 20% of the gut community. The soluble fiber on its own suppressed harmful bacteria like Escherichia-Shigella.¹⁰

The surprising finding was that combining celery fiber and flavonoids together actually blunted some of the beneficial effects. The Akkermansia boost from flavonoids was nearly erased when fiber was added simultaneously, and harmful bacteria rebounded. This is a counterintuitive result that complicates the “whole food is always better” narrative. It also underscores how much we still do not understand about how plant components interact in the digestive system. For practical purposes, eating whole celery still provides fiber and micronutrients, but the microbiome story is far from settled.

Neuroprotective Potential

A line of cell-based research has examined whether celery extract can protect brain cells against damage associated with Alzheimer’s disease. In one study, celery extract improved the survival of human neuroblastoma cells exposed to amyloid-beta, the toxic protein fragment that accumulates in Alzheimer’s brains, raising cell viability from 67% to about 82%. The extract also inhibited several enzymes linked to Alzheimer’s progression, including acetylcholinesterase and glycogen synthase kinase 3 beta.¹¹

Again, cell-culture results are a long way from demonstrating that eating celery prevents cognitive decline. But Alzheimer’s risk is a concern that increases with age, and men tend to underestimate their own risk relative to women, even though prevalence in older age groups is substantial for both sexes. If future research moves these findings into animal and then human studies, celery-derived compounds could become relevant to that conversation. For now, it is a “watch this space” area rather than a reason to change your diet.

Risks, Allergies, and Drug Interactions

Celery is generally safe as a food, but a few cautions are worth knowing about. Celery allergy is more common than many people realize, particularly in Europe. A recently identified allergen in celeriac (the root form), called Api g 7, belongs to a protein family linked to severe systemic reactions. People sensitized to this molecule are often also sensitized to mugwort pollen due to structural similarities between the two allergens.¹² If you have a known mugwort allergy and have never eaten celery or celeriac, introduce it cautiously.

There is also a drug interaction concern that rarely gets mentioned in wellness content. An older but still relevant study found that celery juice decreased cytochrome P450 levels in the liver. Cytochrome P450 enzymes are responsible for metabolizing a huge range of medications. In the study, animals pretreated with celery juice showed prolonged effects from pain relievers like aminopyrine and paracetamol.¹³ This means that large or concentrated amounts of celery juice could theoretically alter how your body processes certain medications, making them stay active longer than intended. If you are on prescription drugs and start drinking large quantities of celery juice daily, mentioning it to your pharmacist or doctor is a reasonable precaution.

Celery is also relatively high in sodium compared to other vegetables, and its oxalate content could be a concern for men prone to kidney stones. Neither of these is a problem at normal dietary amounts, but the celery juice trend, where people drink 16 ounces or more per day, pushes intake well beyond what you would get from eating celery as part of a meal. Concentrated forms demand more awareness of these edge cases than a few stalks on a crudité platter.

Whole Stalks vs. Juice vs. Seed Extract

How you consume celery changes what you are actually getting. Eating whole celery gives you fiber, water, potassium, vitamin K, and modest amounts of flavonoids like apigenin and luteolin. Juicing removes most of the fiber but concentrates some of the bioactive compounds and dramatically increases the volume you can realistically consume. Celery seed extract and celery seed oil are the most concentrated forms and are what most of the supplement-focused research uses.

The blood pressure trial that showed meaningful results used celery seed extract, not whole stalks or juice.¹ The gout research similarly focused on seed extracts and isolated seed compounds.⁵ This matters because someone eating a few stalks of celery at lunch is getting a fundamentally different dose of active compounds than someone taking a standardized seed extract capsule. Most of the specific health claims floating around online were established using concentrated preparations, not the vegetable in its whole form. That does not make eating celery useless, but it does mean the dramatic benefits described in some studies are not automatically achieved by snacking on raw stalks.

Celery seed supplements are widely available but are not regulated with the same rigor as pharmaceuticals. Potency varies between brands, and “celery seed extract” on a label does not guarantee a specific amount of 3-n-butylphthalide or any particular flavonoid. If you are interested in celery for a specific health goal like blood pressure or uric acid management, looking for products that specify their active compound content is worth the extra effort.