Remember how good birthday cake tasted when you were a kid? You couldn’t wait to blow out those candles and get your slice that celebrated getting older.
I hope you’re still enjoying your birthdays to the fullest.
The number of candles on your birthday cake is just that — a number — measuring chronological age.
What really matters is biological age — how our cells, tissues, mitochondria, immune system and metabolism are functioning beneath the surface.
Chronological Age vs. Biological Age
You’ve probably noticed that two people can be the same age, but show it differently.
One may appear much younger while the other shows signs of accelerated aging.
High levels of stress, using tobacco and alcohol, a sedentary lifestyle and a low-quality diet can lead to faster aging.
These stresses don’t just affect how youthful we look, but they also manifest in early-onset diseases, and reduced life expectancy. In other words when it comes to biological aging, your daily choices matter.
My Favorite Healthy Aging Hack
One of my top longevity hacks is consistent infrared sauna use.
I was using infrared sauna way before it became trendy, because I learned that infared sauna therapy acts as a hormetic stressor.
It provides a small, controlled challenge to the body that can promote stronger adaptive responses over time.
Sauna exposure has been shown to mimic some physiological responses of exercise, and its repeated use can optimize stress responses through pathways like heat shock proteins.
This is important because stress affects several interconnected cellular changes related to aging.
Scientists call these changes the hallmarks of aging.
At ten (and counting), they include mitochondrial dysfunction, cellular senescence, chronic inflammation, stem cell exhaustion and dysbiosis, among others.
Five Hallmarks of Aging
Five of those aging pathways have shown positive responses to infrared sauna therapy. Here’s what they do, along with suggestions of how you might include infrared therapy in your longevity protocol.
1. Mitochondrial Dysfunction: Boosting Cellular Energy
Your mitochondria are the energy factories inside your cells, converting what you eat and breathe into a kind of energy known as adenosine triphosphate (ATP).
Mitochondrial health declines as we age, affecting our energy, recovery, metabolism and resilience.
Studies have found that the function of mitochondria is affected by near-infrared and far-infrared light. They improve the structure of the mitochondria and speed up ATP creation. Infrared sauna use also acts as a hormetic stressor.
By gently raising core temperature it increases circulation and activates cellular stress-response pathways.
Because it helps the body adapt its stress ability, infrared sauna goes beyond a sweat tool, creating a repeatable challenge your cells can adapt to.
2. Cellular Senescence: Promoting Cleanup
Cellular senescence happens when cells stop dividing and linger in the body. These so-called “zombie cells” are damaged or defective but won’t die.
In small amounts, senescence can be protective, but accumulation of senescent cells is associated with chronic dysfunction.
Here, infrared sauna therapy provides the body with practice opportunities to adapt to stress and generate beneficial “molecular chaperones” known as heat shock proteins (HSPs).
These specific proteins make it harder for unhealthy cells to replicate and travel throughout the body, and a systematic review suggests that HSPs may play an important role in healthy aging biology.
3. Inflammaging: Calming Systems
“Inflammaging” refers to low-grade chronic inflammation that tends to increase with age. It’s one of the major drivers of accelerated biological aging.
In a study of 2,084 men, higher sauna frequency was associated with lower C-reactive protein, a leading marker of systemic inflammation.
Men using sauna 4–7 times per week had lower average CRP levels than those using it once weekly.
Early research suggests that Infrared sauna therapy counters inflammaging by inducing anti-inflammatory genes, penetrating deep into the skin to activate immune cells and relieve pain, ultimately slowing down the aging process.
Combining sauna with exercise and a healthy diet amplifies its benefits.
4. Gut Dysbiosis: Relieving Inflammation
Gut dysbiosis — an imbalance in the gut microbiome — is now recognized as a key hallmark of aging.
Infrared sauna is not a replacement for a gut-healing diet, fermented foods, fiber or targeted probiotics, but it may support the bigger terrain by promoting circulation, relaxation, sweating and a healthier inflammatory response.
This matters because stress and inflammation can negatively affect digestion, motility and the gut barrier.
Many people also find that sauna helps shift them into a calmer parasympathetic state — the “rest and digest” mode.
5. Stem Cell Exhaustion: Supporting Recovery
Stem cells help with tissue repair and renewal, but stem cell function can decline with age.
Sauna should not be framed as a magic stem cell therapy. Instead, I’d say it supports the recovery environment stem cells need: better circulation, lower stress load, healthy inflammatory balance and improved recovery rhythms.
In one large Finnish cohort study, frequent sauna bathing was associated with reduced risk of fatal cardiovascular events and all-cause mortality. The researchers followed 2,315 middle-aged men for a median of 20.7 years and found dose-related associations with sauna frequency.
That doesn’t prove sauna alone extends life, but it does support the idea that regular heat exposure can be part of a longevity lifestyle.
Red Light & Near-Infrared: Slowing Skin Aging
The use of red light and near-infrared are especially exciting for improving skin feeling and appearance.
Photobiomodulation uses therapeutic red and/or near-infrared wavelengths to support cellular energy. Sunlighten’s RED Light Therapy Panel uses red light at 660 nm and near-infrared at 850 nm.
These wavelengths are in the range considered most effective for therapeutic benefits.
(Sunlighten explains that red light primarily supports skin and microcirculation, while near-infrared penetrates deeper and reaches mitochondria in cells and tissues beyond the skin.)
Research also supports this direction. A randomized controlled trial on red and near-infrared light found improvements in skin appearance, skin feeling, collagen density, fine lines and skin roughness.
My Practical Infrared Sauna Protocols
I’d recommend these routines for most healthy adults:
- Beginner protocol: Start at 100–129°F, keep your first session to 10–15 minutes, and stop if you feel lightheaded, dizzy or overheated.
- Longevity protocol: Work up to 30–40 minutes, 3–5 days per week, based on your hydration, sleep, energy and recovery.
- Skin and anti-aging protocol: Start with 5–10 minutes of red light and near-infrared therapy with Sunlighten’s RED Light Therapy Mask for your face, or freestanding RED Light Therapy Panel targeting specific areas of your body. Then move into the sauna for 15–30 minutes, depending on your experience level. Afterward, cool down for 5–10 minutes and rehydrate, adding electrolytes or minerals if needed.
For ease and consistency, I recommend Sunlighten’s mPulse® intelligent sauna, powered by PulseIQ™.
Unlike saunas that blend full spectrum wavelengths into one general output, PulseIQ delivers red light, near-, mid- and far-infrared separately so your body can absorb the most benefits. Its six guided wellness programs — including Anti-Aging — take the guesswork out of every session.
In summary, while chronological age may count the candles on your cake, but biological age is more about the lightness you feel inside.
And while we can’t stop the birthdays from coming — nor should we, because cake is worth celebrating — we can make informed choices that help us feel better, stronger and more alive with every slice.
That’s the power of a regular infrared routine.
Over time, consistent use can support your mitochondria, circulation, stress response, skin health, inflammatory balance and recovery — all the factors that affect how well you age from the inside out. So keep celebrating the candles, enjoying the cake, and giving your body the energy it needs for the years ahead.
Sunlighten has special savings, save up to $2,100 on your sauna purchase with free shipping. To start building your own consistent infrared routine, click here and use code AXE to save.
