Video·3 min read·May 2026

Harnessing Cold: How Beetroot Juice Can Help Manage Blood Pressure

Cold Therapy • 3 min read • Based on research by Samantha N. Rowland, Emma O’Donnell, Lewis J. James, Mariasole Da Boit, Naoto Fujii, Josh T. Arnold, Alex B. Lloyd, Clare M. Eglin, Anthony I. Shepherd, Stephen J. Bailey (2023)

Imagine stepping into a cool environment, perhaps after a sauna session or a brisk outdoor workout. As the chill envelops you, your body instinctively responds, and you may notice a slight increase in your heart rate. This natural response is designed to keep you warm, but it can also put extra strain on your cardiovascular system. Understanding how to navigate this experience can enhance your well-being, especially when you incorporate the right elements into your routine.

Recent research has shed light on a simple yet powerful intervention: dietary nitrate from beetroot juice. A study conducted by a team of scientists explored how nitrate-rich beetroot juice affects blood pressure during cold exposure. The findings offer valuable insights into how we can better manage our body’s response to cold environments while promoting cardiovascular health.

The Science Behind Cold Exposure and Blood Pressure

When we expose ourselves to cold temperatures, our body activates the sympathetic nervous system. This response leads to peripheral vasoconstriction, a process that narrows blood vessels to conserve heat. However, this mechanism can also increase systemic vascular resistance, resulting in elevated blood pressure. The challenge is to find ways to mitigate this effect, especially for individuals with hypertension or cardiovascular concerns.

The recent study involving twelve participants highlighted how this cold-induced rise in blood pressure can be influenced by dietary choices. Specifically, when participants ingested 140 mL of nitrate-rich beetroot juice, researchers observed a significant reduction in blood pressure increases during cool air exposure. This suggests that dietary nitrate may offer a protective effect against cold-induced cardiovascular strain.

Beetroot Juice: A Simple Addition to Your Routine

So, how does beetroot juice work its magic? When consumed, dietary nitrate is converted into nitrite in the mouth and subsequently transformed into nitric oxide in the stomach. Nitric oxide is a potent vasodilator, meaning it helps widen blood vessels, reducing blood pressure and improving blood flow.

The study found that plasma nitrite levels were higher in participants who consumed beetroot juice in cooler conditions compared to those in warmer environments. This means that the benefits of beetroot juice are amplified when your body is under the stress of cold exposure. By integrating this simple ritual into your pre-cold exposure routine, you can effectively enhance your resilience to environmental stressors.

Practical Implications for Your Wellness Journey

The implications of these findings extend beyond athletic performance. For anyone looking to optimize their health, understanding the interaction between dietary nitrate and cold exposure can inform daily choices. Athletes may find that consuming beetroot juice before outdoor training in cooler temperatures boosts performance and recovery. Meanwhile, individuals concerned about cardiovascular health may benefit from incorporating this nutrient-rich beverage into their diet.

Additionally, the study revealed that cold exposure increased salivary flow rate, which may enhance nitrate metabolism. This means that if you engage in cold exposure practices, such as contrast therapy or cold showers, you may naturally improve your body’s ability to utilize dietary nitrate effectively.

Key Takeaways

Ingesting nitrate-rich beetroot juice can help manage blood pressure during cold exposure, making it a beneficial addition for individuals with cardiovascular concerns.
The interaction between dietary nitrate and cold exposure can enhance your body’s resilience, providing a simple yet effective strategy for optimizing health.
Incorporating beetroot juice into your wellness rituals may amplify the benefits of your cold exposure practices, supporting both recovery and longevity.

Based on: Nitrate ingestion blunts the increase in blood pressure during cool air exposure
Samantha N. Rowland, Emma O’Donnell, Lewis J. James, Mariasole Da Boit, Naoto Fujii, Josh T. Arnold, Alex B. Lloyd, Clare M. Eglin, Anthony I. Shepherd, Stephen J. Bailey (2023). Journal of Sport, Exercise and Health Sciences

Contrast Collective • Science-backed wellness

Wim's Wise Words

A second take, from someone who's lived it.

🧊 Wim's Wise Words

Nitrate ingestion blunts the increase in blood pressure during cool air

The Core Claim

Here's what this study is actually saying, and it's worth sitting with for a moment: beetroot juice works better when you're cold. Not just the same. Better. The Loughborough team put twelve healthy men in 20°C air, gave them either nitrate-rich or nitrate-depleted beetroot juice, and measured what happened to their blood pressure over three hours. In the placebo group, systolic blood pressure climbed — predictably, reliably, exactly as cold physiology predicts it should. In the beetroot group, it didn't. The rise was blunted. And plasma nitrite — the upstream signal for nitric oxide production — was measurably higher in cool conditions than in the room-temperature comparison.

How the Mechanism Actually Works

Cold activates the sympathetic nervous system. That triggers peripheral vasoconstriction — blood vessels narrowing to conserve heat. Up to 40% of that vasoconstrictive response has been attributed to suppressed nitric oxide production. Nitric oxide is your body's primary vasodilatory signal, and cold essentially turns down the tap. Blood pressure climbs. Cardiovascular strain increases. This is why winter correlates with higher cardiovascular mortality — the UK data shows a 17% excess winter mortality rate, and the pattern holds across high and low latitude countries globally.

Dietary nitrate intervenes in this cascade. You eat it, oral bacteria in your mouth reduce it to nitrite, the stomach converts that to nitric oxide, and you get vasodilation. But here's the twist this paper reveals: cold exposure increases salivary flow rate. And elevated salivary flow means more nitrate cycling through your oral cavity, more exposure to those nitrate-reducing bacteria, more nitrite produced from a given dose. The cold environment that's suppressing nitric oxide synthesis via the enzymatic pathway is simultaneously enhancing nitric oxide availability through the dietary pathway.

The cold suppresses your body's ability to make nitric oxide enzymatically — and then creates the exact conditions that make dietary nitrate more effective at restoring it. That's not a coincidence. That's biology finding equilibrium.

Where the Science Agrees and Where It Gets Complicated

The broader literature on dietary nitrate and blood pressure is well-established. Multiple acute studies confirm that nitrate supplementation lowers blood pressure, and the mechanism — the nitrate-nitrite-nitric oxide pathway — is not in dispute. What this study adds is environmental specificity. Temperature matters. Salivary flow matters. The efficacy of a given nitrate dose isn't fixed — it shifts based on the conditions your body is in when you consume it.

One genuine uncertainty the authors flag: there's a theoretical Q10 effect, where lower temperatures could slow the bacterial nitrate reduction in the mouth. If oral bacteria work slower in the cold, you'd expect less nitrite production, not more. The salivary flow increase appears to win that competition — more volume through the system compensates for slower enzymatic rates — but this hasn't been resolved definitively. The study also excluded women, which is a real limitation given what we know about hormonal influences on nitric oxide metabolism.

The Practical Recommendation

If you're doing contrast therapy, cold plunges, or winter outdoor activity and you have any cardiovascular concerns — or if you're simply trying to manage blood pressure — the timing of beetroot juice consumption matters. Drink it before your cold exposure, not after. The cold environment amplifies the nitrate-to-nitrite conversion. You're not fighting the cold's vasoconstrictive effects with a supplement you took hours ago. You're giving your body the raw material it needs, and letting the cold physiology itself accelerate the processing of that material.

The Surprising Connection

What strikes me most here is how elegantly the body's stress response creates the conditions for its own remedy. Cold induces vasoconstriction and raises blood pressure — that's the threat. But cold also increases salivary flow, which enhances nitrate metabolism and nitric oxide availability — that's the partial counter-response. The physiology isn't simply breaking down under environmental stress. It's adapting, and dietary nitrate slots into that adaptation pathway almost perfectly. This is the kind of finding that makes you think differently about what "supporting cold exposure" actually means. It's not just about the cold. It's about everything you bring to the cold.

Nitrate ingestion blunts the increase in blood pressure during cool air

Harnessing Cold: How Beetroot Juice Can Help Manage Blood Pressure

The Science Behind Cold Exposure and Blood Pressure

Beetroot Juice: A Simple Addition to Your Routine

Practical Implications for Your Wellness Journey

Key Takeaways

Related articles

Blood Pressure and Hormonal Responses to Short Whole Body Cold Exposure

L-Citrulline supplementation attenuates blood pressure wave reflection

Cardiovascular responses to cold exposure