In a world where maintaining strong immunity is more important than ever, many of us are turning to natural, non-invasive methods to support our health. One powerful and increasingly popular option is regular use of a near infrared sauna. But can near infrared (NIR) light really give your immune system a boost?
To find out, we looked into scientific research on both traditional and infrared saunas. While each type of heat therapy works a bit differently, the emerging science reveals some intriguing immune-supporting benefits across the board.
Let’s take a look at what the science, and our own experience, says.
Can a Single Sauna Session Give Your Immune System a Boost?
We often think of building immunity as something that happens over time, but what if even one sauna session could help rev up your body’s natural defenses?
A 2013 study published in Journal of Human Kinetics explored exactly that. Researchers looked at how a single 15-minute session in a traditional Finnish sauna affected immune cells and stress levels in two groups: trained athletes and non-athletes. The sauna was hot (about 96°C / 204°F) and after the session, everyone cooled off with a quick cold rinse.
Here’s what the researchers found:
- After just one session, both groups showed an increase in white blood cells, the body’s key infection fighters.
- Specifically, levels of lymphocytes, neutrophils, and basophils, important immune cells that help your body recognize and attack viruses, went up.
- The athletes experienced an even stronger immune response, with bigger boosts in white blood cell counts compared to the non-athletes.
- The athletes also lost more water through sweat, suggesting their bodies may be better adapted to heat stress.
- Cortisol (a stress hormone) was also tracked, helping researchers understand how the body responded overall.
So, what’s the takeaway? Even a single sauna session can stimulate your immune system, and it may be especially effective if you’re already physically active. This doesn’t mean you’ll never get sick, but it suggests sauna use could be a helpful part of your immune-support toolkit, especially during cold and flu season.
Can Sauna Use Lower Inflammation Over Time?
We often think of saunas as a relaxing treat, but regular use might do more than just help you unwind, it may also help calm inflammation in the body, which plays a major role in many illnesses, from heart disease to the common cold.
A long-term study out of Finland looked at the effects of sauna use on several key markers of inflammation. Researchers followed over 2,200 middle-aged men for 11 years, tracking how often they used a sauna and measuring markers like C-reactive protein (CRP), fibrinogen, and white blood cell counts, all of which can signal inflammation or immune system activity in the body.
Here’s what they found:
- Men who used the sauna 4–7 times a week had significantly lower levels of inflammation than those who used it just once a week.
- These anti-inflammatory benefits were seen both at the start of the study and over the long term (after 11 years).
- Interestingly, the study didn’t find changes in oxidative stress markers, meaning the inflammation benefits were likely working through a different mechanism.
So what does this mean for you? It suggests that frequent sauna use may help reduce chronic inflammation, which could support your immune health and possibly lower your risk for a range of illnesses. While this study focused on traditional Finnish saunas and middle-aged men, the findings are still encouraging for anyone looking to add sauna sessions to a healthy lifestyle.
Can Near Infrared Saunas Prevent Illness?
While no sauna can guarantee protection from illness, including near infrared saunas, regular use may help support your body’s natural defenses. Research shows that exposure to heat, like in an infrared sauna, triggers a mild and temporary stress response in the body. This may sound negative, but it actually “trains” your system to get stronger over time.
In fact, studies have found that consistent sauna use can boost antioxidant activity, improve blood circulation, and even increase the production of white blood cells, your body’s frontline defense against illness. One study from BioMed Research International showed that a single sauna session significantly raised white blood cell counts, particularly in active individuals. Another published in JAMA Internal Medicine found that people who used saunas regularly had fewer respiratory illnesses and a lower risk of dying from infections.
Though most of this research has focused on traditional or far infrared saunas, NIR therapy may offer additional benefits thanks to its deeper tissue penetration and mitochondrial stimulation, potentially helping your cells repair and function more effectively.
Bottom line: Consistent near infrared sauna use may strengthen your body’s resilience, making you less susceptible to everyday colds and respiratory infections over time.
How Near Infrared Saunas Work
Unlike traditional steam or far infrared saunas that heat the air or the surface of your body, near infrared saunas use light wavelengths to penetrate deeper into tissue. This targeted heat therapy warms the body from the inside out, promoting a gentle rise in core temperature, similar to a low-grade fever, which is a natural immune response.
This internal heating is what makes near infrared therapy especially effective for immune support, cellular health, and detoxification.
How to Use a Near Infrared Sauna for Immune Support
At Sauna Comfort, we believe in making wellness easy and accessible. Whether you’re new to NIR therapy or already love your sauna sessions, here are a few tips to get the most immune-boosting benefits:
- Frequency: 3–5 times per week is ideal for consistent immune support
- Session Length: Start with 15–20 minutes and increase as your body adapts
- Hydrate: Drink water before and after your session to support detox
Timing: Many people find using the sauna in the morning helps energize the day, while evening sessions promote deep, restorative sleep.
Why Near Infrared is Different
Most of the mainstream sauna research focuses on traditional Finnish or far infrared saunas, but near infrared goes a step further, offering both thermal and photobiomodulation benefits. That means you’re not just heating your body, you’re supporting cellular health, collagen production, detox pathways, and yes, your immune system too.
To Recap
There’s growing evidence that sauna use, especially near infrared, can offer powerful support to your immune system. Whether you’re looking to recover faster, feel more energized, or simply give your body a natural advantage, a near infrared sauna could be one of the most effective tools in your wellness routine.
At Sauna Comfort, our handcrafted, Amish-built near infrared saunas are made from 100% locally sourced basswood and powered entirely by renewable energy. Our mission is to help you live better, feel stronger, and thrive, naturally.