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Light-based treatment is clearly enjoying a moment. You can now buy illuminated devices for everything from skin conditions and wrinkles as well as aching tissues and periodontal issues, the newest innovation is an oral care tool outfitted with miniature red light sources, promoted by the creators as “a major advance in personal mouth health.” Worldwide, the market was worth $1bn in 2024 and is projected to grow to $1.8bn by 2035. Options include full-body infrared sauna sessions, which use infrared light to warm the body directly, the infrared radiation heats your body itself. Based on supporter testimonials, it feels similar to a full-body light therapy session, boosting skin collagen, easing muscle tension, reducing swelling and long-term ailments as well as supporting brain health.

Research and Reservations

“It appears somewhat mystical,” observes a Durham University professor, a scientist who has studied phototherapy extensively. Certainly, certain impacts of light on human physiology are proven. Sunlight helps us make vitamin D, needed for bone health, immunity, muscles and more. Natural light synchronizes our biological clocks, too, activating brain chemicals and hormonal responses in daylight, and preparing the body for rest as darkness falls. Daylight-simulating devices are standard treatment for winter mood disorders to boost low mood in winter. So there’s no doubt we need light energy to function well.

Various Phototherapy Approaches

Although mood lamps generally utilize blue-spectrum frequencies, most other light therapy devices deploy red or infrared light. In serious clinical research, such as Chazot’s investigations into the effects of infrared on brain cells, identifying the optimal wavelength is crucial. Photons represent electromagnetic waves, spanning from low-energy radio waves to high-energy gamma radiation. Therapeutic light application uses wavelengths around the middle of this spectrum, including invisible ultraviolet radiation, then the visible spectrum we perceive as colors and finally infrared detectable with special equipment.

Dermatologists have utilized UV therapy for extensive periods to treat chronic skin conditions such as eczema, psoriasis and vitiligo. It works on the immune system within cells, “and reduces inflammatory processes,” says Dr Bernard Ho. “There’s lots of evidence for phototherapy.” UVA penetrates skin more deeply than UVB, while the LEDs in consumer devices (usually producing colored light emissions) “typically have shallower penetration.”

Risk Assessment and Professional Supervision

The side-effects of UVB exposure, such as burning or tanning, are understood but clinical devices employ restricted wavelength ranges – indicating limited wavelength spectrum – that reduces potential hazards. “Treatment is monitored by medical staff, meaning intensity is regulated,” notes the specialist. Essentially, the devices are tuned by qualified personnel, “to guarantee appropriate wavelength emission – different from beauty salons, where regulations may be lax, and wavelength accuracy isn’t verified.”

Home Devices and Scientific Uncertainty

Red and blue LEDs, he notes, “aren’t typically employed clinically, but they may help with certain conditions.” Red LEDs, it is proposed, help boost blood circulation, oxygen uptake and dermal rejuvenation, and activate collagen formation – a key aspiration in anti-ageing effects. “Studies are available,” states the dermatologist. “But it’s not conclusive.” In any case, with numerous products on the market, “it’s unclear if device outputs match study parameters. Appropriate exposure periods aren’t established, ideal distance from skin surface, the risk-benefit ratio. There are lots of questions.”

Treatment Areas and Specialist Views

Early blue-light applications focused on skin microbes, microorganisms connected to breakouts. Scientific backing remains inadequate for regular prescription – even though, notes the dermatologist, “it’s commonly used in cosmetic clinics.” Certain patients incorporate it into their regimen, he mentions, but if they’re buying a device for home use, “we just tell them to try it carefully and to make sure it has been assessed for safety. If it’s not medically certified, the regulation is a bit grey.”

Cutting-Edge Studies and Biological Processes

Meanwhile, in advanced research areas, researchers have been testing neural cells, discovering multiple mechanisms for infrared’s cellular benefits. “Nearly every test with precise light frequencies demonstrated advantageous outcomes,” he says. Multiple claimed advantages have created skepticism toward light treatment – that claims seem exaggerated. Yet, experimental evidence has transformed his viewpoint.

Chazot mostly works on developing drug treatments for neurodegenerative diseases, however two decades past, a GP who was developing an antiviral light treatment for cold sores sought his expertise as a biologist. “He developed equipment for cellular and insect experiments,” he recalls. “I was quite suspicious. This particular frequency was around 1070 nanometers, that many assumed was biologically inert.”

Its beneficial characteristic, however, was its efficient water penetration, allowing substantial bodily penetration.

Cellular Energy and Neurological Benefits

Additional research indicated infrared affected cellular mitochondria. Mitochondria produce ATP for cell function, producing fuel for biological processes. “Every cell in your body has mitochondria, including the brain,” explains the neuroscientist, who prioritized neurological investigations. “Research confirms improved brain blood flow with phototherapy, which is always very good.”

With 1070 treatment, energy organelles generate minimal reactive oxygen compounds. At controlled levels these compounds, notes the scientist, “triggers guardian proteins that maintain organelle health, look after your cells and also deal with the unwanted proteins.”

These processes show potential for neurological conditions: oxidative protection, anti-inflammatory, and cellular cleanup – autophagy being the process the cell uses to clear unwanted damaging proteins.

Current Research Status and Professional Opinions

The last time Chazot checked the literature on using the 1070 wavelength on human dementia patients, he reports, several hundred individuals participated in various investigations, incorporating his preliminary American studies