Beetroot shows genuine promise for erectile function, though the evidence is still early. The connection is nitric oxide, the same molecule that prescription ED medications work through. Beetroot is one of the richest dietary sources of nitrates, which your body converts into nitric oxide to relax blood vessels and increase blood flow, including to the penis.
How Beetroot Affects Blood Flow
Erections depend on blood flow. When you’re aroused, blood vessels in the penis relax and widen, allowing blood to fill the erectile tissue. The signal that triggers this relaxation is nitric oxide. In many men with ED, nitric oxide production is impaired, often due to aging, cardiovascular disease, diabetes, or other conditions that damage blood vessel linings.
Beetroot is packed with inorganic nitrate. When you drink beetroot juice or eat whole beets, about 25% of that nitrate gets converted to nitrite by bacteria living on your tongue. Once the nitrite reaches your stomach, some of it converts further into nitric oxide. The rest is absorbed through your gut into the bloodstream, where it continues raising levels of both nitric oxide and nitrite in circulation. This increased nitric oxide availability causes blood vessels to dilate throughout the body.
This is the same basic pathway that ED medications target. Those drugs don’t create nitric oxide directly. They prevent the breakdown of a secondary messenger that nitric oxide activates, prolonging the relaxation signal in penile blood vessels. Beetroot works upstream, boosting the nitric oxide supply itself.
What the Research Actually Shows
No large clinical trial has tested beetroot alone for erectile dysfunction. The existing evidence is indirect but consistent: beetroot reliably improves blood vessel function and blood pressure in dozens of cardiovascular studies, and impaired blood flow is the most common physical cause of ED.
One small crossover study of 10 men (average age 52, with mild to moderate ED) tested a supplement containing beetroot extract alongside L-citrulline, ginseng, and muira puama. Participants wore a monitoring device during sleep to measure nighttime erections, which are a reliable indicator of erectile capacity because they occur without psychological interference. The supplement increased the overall strength and duration of nighttime erections by 47% compared to baseline. The number of erections per night didn’t change significantly, but the quality of each erection improved substantially.
The limitation is obvious: the supplement contained multiple ingredients, so beetroot’s individual contribution can’t be isolated. Still, the result aligns with what cardiovascular research would predict. If nitric oxide levels rise, blood vessels dilate more effectively, and erectile tissue fills more completely.
How Much Beetroot You’d Need
Most research on beetroot’s vascular effects uses a dose of 350 to 500 mg of nitrate, which equals roughly 6 to 8 millimoles. That’s the amount in about 70 ml (roughly 2.5 ounces) of concentrated beetroot juice, the kind sold as small “shots.” Taking more than about 10 to 12 millimoles doesn’t appear to produce additional benefit.
If you prefer whole beets over juice, you can still hit therapeutic nitrate levels. Cooked beetroot contains somewhere between 145 and 270 mg of nitrate per 100 grams depending on the variety and preparation, so a serving of 200 to 300 grams (roughly one to two medium beets) gets you into the effective range.
Timing matters. Nitrate levels in the blood peak about two hours after you consume beetroot. For exercise performance, researchers recommend consuming it two to three hours beforehand. If you’re using it for erectile function, the same window likely applies. Concentrated juice shots deliver a more predictable and consistent dose than whole beets or regular juice, since nitrate content in fresh produce varies with growing conditions.
Beetroot vs. ED Medications
Beetroot is not a replacement for prescription ED treatment. The nitric oxide boost from dietary nitrate is real but modest compared to the targeted, potent effect of pharmaceutical options. Men with significant ED caused by vascular disease, nerve damage, or hormonal issues are unlikely to see full resolution from beetroot alone.
Where beetroot may fit best is as a complement. Because it works on a different part of the same pathway, it could theoretically enhance the effects of other approaches. It also makes sense as a first step for men with mild symptoms, or as part of broader cardiovascular improvements like exercise and dietary changes that address the root cause of most ED: poor blood vessel health.
One thing beetroot won’t do is work on demand the way medications do. Its effects on nitric oxide are gradual and systemic rather than targeted to penile tissue. Regular consumption over days or weeks is more likely to produce noticeable results than a single dose.
Risks and Practical Considerations
Beetroot is safe for most people, but there are a few things worth knowing. The most visible side effect is beeturia, a harmless reddish discoloration of urine and stool that can be alarming if you’re not expecting it.
The more meaningful concern is oxalate. Beetroot juice has some of the highest oxalate concentrations of any vegetable juice, ranging from 60 to 70 mg per 100 ml. If you’re prone to calcium oxalate kidney stones, drinking large amounts of beetroot juice daily could increase your risk. Even 500 ml per day of high-oxalate vegetable juice contributes meaningfully to total oxalate intake. Concentrated shots are a better choice here since you get the nitrate dose in a much smaller volume.
One overlooked factor: antibacterial mouthwash can reduce beetroot’s effectiveness. The conversion of nitrate to nitrite depends on specific bacteria on your tongue. If you kill those bacteria with mouthwash, less nitric oxide gets produced. If you’re using beetroot for its vascular benefits, skip the antiseptic mouthwash or at least separate them by several hours.
The Bigger Picture
ED is often an early warning sign of cardiovascular disease. The blood vessels supplying the penis are smaller than those feeding the heart, so they tend to show damage first. This means the same dietary pattern that improves heart health, rich in nitrate-containing vegetables, healthy fats, and fiber, also supports erectile function over time.
Beetroot is one of the most nitrate-dense foods available, but it’s not the only option. Leafy greens like spinach, arugula, and lettuce are also high in dietary nitrate. A diet consistently rich in these vegetables provides a steady supply of raw material for nitric oxide production, which benefits blood pressure, exercise capacity, and vascular function broadly. For men whose ED has a vascular component, which accounts for the majority of cases, this kind of sustained dietary change is more valuable than any single supplement.