Foods That Help the Body Make Nitric Oxide

Beets are naturally rich in dietary nitrates, which the body converts into nitric oxide — a compound that helps blood vessels relax and improves the delivery of oxygen during physical activity.

Studies suggest that beet juice can help lower blood pressure, support endurance, and reduce recovery time after exercise, particularly in people with cardiovascular risk or high activity levels.

Whether roasted, shredded raw, or blended into smoothies, beets keep their nitrate content — making them a flexible and efficient option for nitric oxide support.

Spinach is one of the most consistent leafy green sources of dietary nitrates — the compounds your body uses to produce nitric oxide. That’s part of what makes it especially valuable for supporting circulation and blood pressure through food.

Unlike some vegetables, spinach retains its nitrate content when lightly cooked, which makes it adaptable in everyday meals. It also brings the added benefit of iron, potassium, and fiber — nutrients that support vascular function more broadly.

That flexibility — combined with steady nitrate levels — makes spinach one of the most accessible ways to support nitric oxide through diet.

Arugula is one of the most concentrated sources of dietary nitrates among commonly available vegetables — even more so than spinach or kale. That makes it especially effective for supporting nitric oxide production, particularly when eaten raw.

Its sharp flavor and small serving size work in its favor: you don’t need much to get a measurable benefit. For people managing blood pressure or looking to support circulation through diet, arugula offers a quick, nutrient-dense addition.

Garlic supports nitric oxide in a different way. Instead of supplying nitrates, it helps the body make its own nitric oxide — a process tied to better blood flow and circulation.

This effect is linked to sulfur compounds like allicin, which also give garlic its strong smell. These compounds may help nitric oxide stay active longer by protecting it from breaking down too quickly.

For the best effect, garlic should be crushed or chopped and allowed to sit briefly before cooking — a simple preparation tweak that preserves more of its active compounds.

Citrus fruits don’t provide nitrates, but they still play a useful role in nitric oxide metabolism. They’re rich in vitamin C, which helps protect nitric oxide from breaking down too quickly in the body.

That makes vitamin C a kind of stabilizer — it doesn’t boost production, but it helps the nitric oxide you already make stay active longer. This benefit ties into circulation and blood vessel flexibility, especially when paired with nitrate-rich foods like spinach or beets.

Oranges, grapefruit, lemons, and limes are all good sources, particularly when eaten raw or juiced without added sugar.

Pomegranate supports nitric oxide by protecting it, not by producing it. Its seeds and juice are rich in polyphenols — antioxidants that may help nitric oxide stay active longer by reducing oxidative stress in the bloodstream.

This protective effect has made pomegranate a recurring subject in studies on blood flow, particularly around exercise and heart health. While results vary, some findings suggest improved circulation and artery function with regular intake — especially when consumed as juice or blended into meals.

Watermelon doesn’t contain nitrates like leafy greens do, but it still supports nitric oxide in the body. It’s one of the best natural sources of L-citrulline, an amino acid that helps the body make nitric oxide.

Some studies have linked watermelon juice to better blood flow and exercise recovery, thanks to its role in widening blood vessels.

Most of the citrulline is found near the rind, but any fresh watermelon can contribute. It’s an easy option in smoothies, juices, or on its own.

Dark chocolate supports nitric oxide through its flavanol content — plant compounds that help relax blood vessels and improve circulation. These compounds stimulate nitric oxide production in the vessel lining, and have been studied for their effects on blood pressure and artery function.

The key is choosing chocolate with a high cocoa content. Look for options labeled 70% or higher, with minimal added sugar. A small amount of cocoa powder or dark chocolate can provide consistent support.

Walnuts offer a mix of healthy fats, antioxidants, and polyphenols — a combination that may help support nitric oxide levels by protecting blood vessels and reducing oxidative stress.

They’re easy to keep on hand and don’t require prep or planning. They work well in place of processed snacks or saturated fats, and fit naturally into a diet that supports circulation and long-term heart health.

Lentils, chickpeas, black beans, and other legumes support nitric oxide in a few different ways. They contain compounds that may help the body produce nitric oxide, while also offering fiber, plant protein, and antioxidants that contribute to long-term vascular health.

Legumes also help stabilize blood sugar, which indirectly supports nitric oxide by reducing inflammation and protecting the lining of blood vessels.

Whether added to soups, salads, or grain bowls, legumes offer a steady, low-cost way to support nitric oxide as part of a broader heart-healthy diet.

The way you prepare food — and what you pair it with — can make a difference in how your body uses nitric oxide. For nitrate-rich vegetables like spinach or arugula, cooking gently helps preserve the compounds that matter. Overheating them can reduce their effect.

Hydration also plays a role, as does eating at regular intervals. These habits support the chemical processes that help convert nutrients into nitric oxide.

Finally, your mouth matters: beneficial bacteria help convert dietary nitrates into nitrites — a key early step in nitric oxide production. Research shows that regularly using antibacterial mouthwash can reduce this bacterial activity and interfere with nitric oxide formation.