Article: What Is Photobiomodulation?
What Is Photobiomodulation?
Your body already knows how to heal.
Given the right conditions — rest, circulation, cellular energy — it repairs muscle, renews skin, quiets inflammation, and restores itself with remarkable precision. What red light therapy does is simple: it gives your cells more of what they need to do that work.
This is photobiomodulation. And it's one of the most researched recovery tools available today.
What Is Photobiomodulation?
Photobiomodulation — also called red light therapy or low-level light therapy — is the therapeutic application of specific wavelengths of red and near-infrared light to living tissue. Unlike lasers that cut or ablate, or UV light that can damage DNA, photobiomodulation uses non-ionizing, non-thermal light to stimulate your cells from within.
The term was formally adopted by the American Society for Laser Medicine and Surgery and the World Association for Laser Therapy. It's the science behind what you may already know as red light therapy.
In plain terms: certain wavelengths of light, delivered at the right intensity, switch your cells into a higher state of function. More energy. More repair. Less inflammation.
How It Works
Inside every cell are mitochondria — the structures responsible for producing ATP, the energy your body runs on. When tissue is stressed, inflamed, or recovering from exertion, a molecule called nitric oxide binds to a key mitochondrial enzyme (cytochrome c oxidase) and inhibits its function. ATP output drops. Healing slows.
Red and near-infrared light reverse this.
When the right wavelengths reach mitochondrial tissue, they release the inhibitory nitric oxide, allowing the enzyme to resume full function. ATP production increases. With more cellular energy available, the downstream effects are broad:
- Reduced inflammation
- Accelerated tissue repair
- Increased circulation and oxygen delivery
- Collagen stimulation
- Improved cellular communication
This is why photobiomodulation has therapeutic relevance across so many conditions — it acts on a fundamental cellular mechanism, not a single disease pathway.
What It's Not
It's not infrared sauna. Sauna uses far-infrared heat to warm the body thermally. Photobiomodulation uses near-infrared light for non-thermal photochemical stimulation — a different mechanism entirely, though both support recovery in their own right.
It's not UV therapy. UV light (below 400nm) is used for certain skin conditions but carries DNA damage risk. Photobiomodulation operates in the 600–1100nm range — a completely different part of the spectrum.
It's not casual light exposure. Therapeutic photobiomodulation requires precise wavelengths delivered at clinical irradiance levels. Sitting near a window doesn't replicate it.
The Research Behind It
Photobiomodulation is supported by over 6,000 peer-reviewed studies indexed in PubMed. It has received FDA clearance for:
- Temporary relief of minor muscle and joint pain
- Temporary relief of minor arthritis pain
- Relaxation of muscle spasm
- Temporary increase in local blood circulation
- Hair loss (androgenetic alopecia) — specific devices
It's used clinically across physical therapy, sports medicine, dermatology, and oncology supportive care. This is not fringe wellness. It's studied, documented, and increasingly standard in elite recovery environments.
Getting the Dose Right
Therapeutic photobiomodulation depends on three variables: wavelength, irradiance (power density), and session duration. These parameters determine whether the light actually reaches the tissue — and at what therapeutic dose.
More is not always better. Research shows a biphasic response: too little has no effect, the right amount is therapeutic, and too much can actually be inhibitory. This is why device quality and clinical specifications matter — and why we're selective about what we carry.
At InfraCore, every product in our red light therapy collection is specified to deliver therapeutic irradiance at clinically relevant wavelengths. We don't carry decorative wellness products.
Common Questions
Is red light therapy the same as photobiomodulation?
Yes. Red light therapy is the consumer name for photobiomodulation using red and near-infrared
wavelengths. Same science, different terminology.
How often should I use it?
Research supports 3–5 sessions per week for most applications. Consistency over time produces better
results than infrequent high-dose sessions. Many people build a 15–20 minute session into their
morning or evening routine.
How long is a session?
Typically 10–20 minutes depending on device, distance from the panel, and treatment area. Full-body
devices at therapeutic irradiance deliver effective tissue doses within this window.
Is it safe?
Photobiomodulation has an excellent safety profile across decades of clinical use. Standard
precautions: protect eyes during treatment; consult a physician if you take photosensitizing
medications; avoid direct irradiation of known tumor sites.
Further Reading
Ready to go deeper? Our next article in The Recovery Library covers the full science — wavelength by wavelength, tissue by tissue, with a breakdown of the peer-reviewed evidence behind each application.
→ The Science of Light Therapy: A Full-Spectrum Guide
InfraCore Wellness does not make medical claims. This content is for educational purposes only. Consult a qualified healthcare provider for medical advice specific to your condition.
Sources: Hamblin MR. "Mechanisms and applications of the anti-inflammatory effects of photobiomodulation." AIMS Biophysics, 2017. | Karu TI. "Primary and secondary mechanisms of action of visible to near-IR radiation on cells." Journal of Photochemistry and Photobiology B, 1999.