Several common drinks can measurably increase blood flow, mostly by helping your blood vessels relax and widen. Beetroot juice has the strongest evidence, with blood pressure reductions of nearly 8 mmHg in clinical trials. But it’s not the only option. Cocoa, green tea, pomegranate juice, and even orange juice all contain compounds that improve how well your blood vessels open and deliver blood to your tissues.
Beetroot Juice: The Strongest Evidence
Beetroot juice is the most studied drink for improving blood flow, and the results are hard to ignore. In a trial published by the American Heart Association, people with high blood pressure who drank beetroot juice daily saw their systolic blood pressure drop by about 7.7 mmHg and diastolic pressure drop by 5.2 mmHg over 24-hour monitoring. Those reductions held steady across a four-week intervention with no sign of the body adapting and losing the benefit.
The mechanism is well understood. Beetroot juice is packed with natural nitrates. When you drink it, the nitrate gets absorbed in your upper intestine and then cycled back into your mouth through your saliva glands. Bacteria on your tongue convert the nitrate into nitrite, and once you swallow that saliva, your body further converts it into nitric oxide, a molecule that signals blood vessels to relax and widen. This is the same molecule your body already uses to regulate blood flow, so you’re essentially giving it more raw material to work with.
Timing matters. Nitric oxide levels in your blood peak about two to three hours after drinking beetroot juice, with measurable performance and circulation effects appearing around 150 minutes post-ingestion. If you’re drinking it before exercise or an activity where you want better circulation, plan accordingly.
Cocoa and Hot Chocolate
High-flavanol cocoa improves blood vessel function in a way that shows up clearly on ultrasound. In a study at the University of Birmingham, researchers measured how well the brachial artery (the main artery in your upper arm) dilated after participants drank high-flavanol cocoa versus a low-flavanol version. Thirty minutes after a stress test, the high-flavanol group maintained significantly better artery dilation: 5.75% compared to 3.86% in the low-flavanol group. That difference persisted at 90 minutes.
The flavanols in cocoa work by boosting nitric oxide production in the cells lining your blood vessels. This is the same end result as beetroot juice, just through a different starting point. The catch is that not all cocoa products are equal. Heavily processed cocoa powder and most commercial hot chocolate mixes have had their flavanols stripped away during manufacturing. Look for minimally processed cocoa or products that specifically list flavanol content. Dark chocolate drinks made from raw or lightly processed cacao will generally deliver more than a standard milk chocolate mix.
Green Tea
Green tea contains a compound called EGCG that can improve artery function within hours. In a study of patients with coronary artery disease, a single 300 mg dose of EGCG improved brachial artery dilation from 7.1% to 8.6% within two hours, which is roughly the time EGCG reaches its peak concentration in your blood. That’s a meaningful improvement for people whose arteries are already compromised.
One important nuance: the same study found that after two weeks of daily EGCG supplementation, the benefit faded back toward baseline. This suggests green tea may work best as an acute circulation booster rather than a long-term vascular therapy. Drinking a cup or two before you need better blood flow could be more effective than relying on it as a daily supplement for lasting change.
Pomegranate Juice
Pomegranate juice increased blood flow by roughly 37% compared to placebo in one exercise study. Participants who consumed pomegranate extract before working out had blood flow of 40.6 mL/min thirty minutes after ingestion, compared to 29.6 mL/min with placebo. Their blood vessel diameter also expanded significantly, from 0.39 cm to 0.42 cm measured thirty minutes after exercise.
Those numbers may look small in absolute terms, but a wider vessel lets substantially more blood through. Pomegranate is rich in polyphenols that, like cocoa flavanols, support nitric oxide availability and protect it from being broken down too quickly. This makes pomegranate juice a reasonable choice before physical activity when you want to maximize blood delivery to working muscles.
Orange Juice
Orange juice improves blood flow through a flavonoid called hesperidin. In a randomized crossover study of healthy middle-aged men, both orange juice and isolated hesperidin significantly improved microvascular reactivity compared to a control. The improvements were measured at peak hesperidin absorption, and regular consumption also lowered diastolic blood pressure.
Microvascular reactivity refers to how well your smallest blood vessels respond to signals telling them to open up. This is the level of circulation that matters most for delivering oxygen and nutrients to your tissues, not just the big arteries. Orange juice is an accessible, everyday option that doesn’t require specialty shopping.
Coffee: It’s Complicated
Coffee’s effect on blood flow is genuinely mixed, and the answer depends on whether you drink it regularly. In the short term, caffeine blocks adenosine receptors in blood vessel walls, which causes a brief constriction. Studies show blood pressure rises by 6 to 7.5 mmHg systolic about 60 minutes after the equivalent of a triple espresso in people who don’t normally drink coffee.
But caffeine also stimulates nitric oxide production in the cells lining your blood vessels, and this vasodilating effect appears to be the dominant one overall. Research on isolated human arteries shows that after a very slight initial constriction, caffeine produces a significant and sustained widening of blood vessels. If you’re a regular coffee drinker, the constriction effect diminishes even further. Habitual consumption of just two cups a day for more than five days causes your body to upregulate its adenosine receptors, essentially adapting to caffeine’s blocking effect. A meta-analysis found that chronic consumption of five cups daily raised blood pressure by only 2.4/1.2 mmHg, far less than the acute spike seen in non-drinkers.
So coffee isn’t a reliable tool for acutely boosting circulation, especially if you don’t drink it regularly. But for habitual drinkers, the net vascular effect leans toward dilation rather than constriction.
Red Wine in Moderation
Red wine contains resveratrol, a compound that activates nitric oxide production in platelets and blood vessel linings. In a study of 20 healthy volunteers who drank 300 mL of red wine daily for 15 days, plasma resveratrol increased significantly, along with nitric oxide release from stimulated platelets. Resveratrol specifically activates the enzyme responsible for producing nitric oxide in blood vessel walls, even at the relatively low concentrations you’d get from a moderate glass of wine.
The practical limitation is obvious: alcohol carries its own cardiovascular risks, and the resveratrol content in a single serving of wine is modest. Grape juice contains some of the same polyphenols without the alcohol, though at lower concentrations. Red wine shouldn’t be your primary strategy for improving circulation, but if you already drink it moderately, the resveratrol does contribute to vascular health.
Water: The Overlooked Baseline
Before reaching for specialty juices, make sure you’re drinking enough water. When you’re dehydrated, your blood becomes thicker and more viscous, which makes it harder to push through small vessels. While one controlled trial found that simply increasing water intake beyond normal levels didn’t further reduce viscosity in well-hydrated people, the inverse is well established: dehydration reliably impairs circulation. Observational data have linked higher water intake to lower risk of coronary heart disease, with reduced blood viscosity as the proposed mechanism.
If your baseline hydration is poor, no amount of beetroot juice or cocoa will compensate. Adequate water intake keeps your blood at the right consistency to flow freely, and that’s the foundation everything else builds on.
Getting the Most Out of These Drinks
If you want to target blood flow specifically, beetroot juice two to three hours before exercise or activity gives you the most evidence-backed benefit. Combining it with a source of flavanols, like cocoa or pomegranate juice, attacks the problem from multiple angles since these compounds support nitric oxide through different biochemical routes.
People taking blood pressure medications should be aware that nitrate-rich drinks like beetroot juice can amplify their effects. Clinical studies have typically excluded participants on anticoagulants and certain other medications as a precaution, though participants taking a single blood pressure drug in one trial responded similarly to those on no medication. If you’re on blood pressure drugs, the combination could push your pressure lower than expected, so it’s worth monitoring how you feel and adjusting with guidance.
Processing matters across the board. Fresh-squeezed orange juice delivers more hesperidin than heavily filtered versions. Raw cacao has more flavanols than Dutch-processed cocoa. And commercial “beetroot juice blends” diluted with apple juice contain far less nitrate per serving than pure beetroot juice. Read labels and choose products that haven’t had their active compounds processed out.