This is a topic that comes up from time to time as the trend comes and goes. With our cold weather in WV, the topic of infrared saunas is “hot” again.
What is an infrared sauna? These are booths or tents of some sort that are lined with infrared lights. In contrast to a regular sauna that heats the air in the “room”, an infrared sauna works by using infrared rays to warm your body and your skin. Depending on the strength of the lights, people often start at shorter sessions of 5-10 minutes and increase as tolerated.
What is infrared? Infrared generally refers to a wavelength of light that is beyond the UV and visible spectrum. It is wavelengths of light starting at 700nm. It accounts for about 40% of the solar radiation that we experience as “warming” of the sun on our skin. Because of the long wavelength of light, infrared can reach deeper in the skin than UV radiation. The deeper reach allows infrared radiation to reach the deeper layer of the skin, including the dermis where it can impact collagen, elastin and pigment cells.
Are there different types of Infrared Radiation? Yes, just like in the nomenclature for UV light, there is Infrared (IR) A, B and C. Infrared A (700-1400nm) penetrates all the way to the fat layers of the skin. IRC is mostly absorbed by the stratum corneum, the dead layer of skin on the outside. So, depending on the wavelength of light of a device, the health benefit or detriment can have great variability.
Are there benefits? Possibly. Besides just feeling good on a warm today, a number of health and mood stimulating benefits are claimed. However, none of these have been proven in large scientific studies.
What are the risks? Infrared light exposure can be damaging to both the eyes and the skin. In this blog we are all about the skin, which is why this trend is concerning to dermatologists. The impact on the skin is still up in the air as the results are mixed. It appears that Infrared light PLUS heat is more damaging to the skin than infrared light without heat accumulation. Thus, the infrared sauna is definitely questionable.
What is the impact on the skin? There are a mix of scientific studies that show both negative and positive impact on the skin. In some studies, there appears to be a low dose “therapeutic range” of infrared that may have positive therapeutic effects such as wound healing. However, the exact wavelength, irradiance and total dose for positive and negative effects is yet to be determined.
There are also a large number of studies that demonstrate that Infrared radiation leads to breakdown of collagen and elastin, leading to increased wrinkles. No one wants more wrinkles.
So what’s the verdict? Although I have a few patients who love them, I can’t recommend infrared saunas. Those choosing to use one need to consider the wavelength of the device, the heat generated which worsens damage, and the amount of radiation they are receiving.
Companies selling these devices offer limited evidence and lots of promises without emphasizing the potential deleterious effects. And no one I know would choose more wrinkles!
