‘It seems like sorcery’: is light therapy truly capable of improving your skin, whitening your teeth, and strengthening your joints?

Phototherapy is definitely experiencing a surge in popularity. There are now available illuminated devices for everything from complexion problems and aging signs as well as aching tissues and gum disease, the newest innovation is an oral care tool equipped with tiny red LEDs, promoted by the creators as “a major advance in personal mouth health.” Globally, the sector valued at $1bn last year is expected to increase to $1.8bn within the next decade. You can even go and sit in an infrared sauna, where instead of hot coals (real or electric) heating the air, the thermal energy targets your tissues immediately. As claimed by enthusiasts, it’s like bathing in one of those LED-lit beauty masks, stimulating skin elasticity, easing muscle tension, reducing swelling and persistent medical issues as well as supporting brain health.

Research and Reservations

“It appears somewhat mystical,” notes a neuroscience expert, a scientist who has studied phototherapy extensively. Naturally, certain impacts of light on human physiology are proven. Sunlight helps us make vitamin D, crucial for strong bones, immune defense, and tissue repair. Natural light synchronizes our biological clocks, too, triggering the release of neurochemicals and hormones while we are awake, and signaling the body to slow down for nighttime. 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.

Different Light Modalities

Whereas seasonal affective disorder devices typically employ blue-range light, consumer light therapy products mostly feature red and infrared emissions. During advanced medical investigations, such as Chazot’s investigations into the effects of infrared on brain cells, identifying the optimal wavelength is crucial. Light constitutes electromagnetic energy, which runs the spectrum from the lowest-energy, longest wavelengths (radio waves) to high-energy gamma radiation. Phototherapy, or light therapy uses wavelengths around the middle of this spectrum, including invisible ultraviolet radiation, followed by visible light encompassing rainbow colors and infrared light visible through night vision technology.

UV light has been used by medical dermatologists for many years for addressing long-term dermatological issues like vitiligo. It works on the immune system within cells, “and suppresses swelling,” explains a skin specialist. “Substantial research supports light therapy.” UVA goes deeper into the skin than UVB, whereas the LEDs we see on consumer light-therapy devices (typically emitting red, infrared or blue wavelengths) “typically have shallower penetration.”

Safety Considerations and Medical Oversight

UVB radiation effects, including sunburn or skin darkening, are well known but in medical devices the light is delivered in a “narrow-band” form – signifying focused frequency bands – which decreases danger. “Treatment is monitored by medical staff, thus exposure is controlled,” explains the dermatologist. Most importantly, the devices are tuned by qualified personnel, “to guarantee appropriate wavelength emission – as opposed to commercial tanning facilities, where it’s a bit unregulated, and wavelength accuracy isn’t verified.”

Consumer Devices and Evidence Gaps

Red and blue light sources, he says, “aren’t really used in the medical sense, but could assist with specific concerns.” Red LEDs, it is proposed, enhance blood flow, oxygen utilization and dermal rejuvenation, and promote collagen synthesis – a primary objective in youth preservation. “The evidence is there,” says Ho. “However, it’s limited.” Nevertheless, given the plethora of available tools, “it’s unclear if device outputs match study parameters. Optimal treatment times are unknown, ideal distance from skin surface, the risk-benefit ratio. Numerous concerns persist.”

Treatment Areas and Specialist Views

One of the earliest blue-light products targeted Cutibacterium acnes, microorganisms connected to breakouts. Research support isn’t sufficient for standard medical recommendation – even though, notes the dermatologist, “it’s often seen in medical spas or aesthetics practices.” Certain patients incorporate it into their regimen, he mentions, however for consumer products, “we recommend careful testing and security confirmation. Without proper medical classification, standards are somewhat unclear.”

Cutting-Edge Studies and Biological Processes

Meanwhile, in advanced research areas, Chazot has been experimenting with brain cells, identifying a number of ways in which infrared can boost cellular health. “Nearly every test with precise light frequencies demonstrated advantageous outcomes,” he says. It is partly these many and varied positive effects on cellular health that have driven skepticism about light therapy – that claims seem exaggerated. But his research has thoroughly changed his mind in that respect.

The researcher primarily focuses on pharmaceutical solutions for brain disorders, though twenty years earlier, a doctor developing photonic antiviral treatment consulted his scientific background. “He created some devices so that we could work with them with cells and with fruit flies,” he says. “I remained doubtful. The specific wavelength measured approximately 1070nm, that many assumed was biologically inert.”

Its beneficial characteristic, nevertheless, was its ability to transmit through aqueous environments, meaning it could penetrate the body more deeply.

Mitochondrial Effects and Brain Health

More evidence was emerging at the time that infrared light targeted the mitochondria in cells. These organelles generate cellular energy, generating energy for them to function. “Every cell in your body has mitochondria, including the brain,” says Chazot, who concentrated on cerebral applications. “Studies demonstrate enhanced cerebral circulation with light treatment, which is consistently beneficial.”

With 1070 treatment, cellular power plants create limited oxidative molecules. In low doses this substance, notes the scientist, “triggers guardian proteins that maintain organelle health, protect cellular integrity and manage defective proteins.”

Such mechanisms indicate hope for cognitive disorders: antioxidant, swelling control, and waste removal – autophagy representing cellular waste disposal.

Present Investigation Status and Expert Assessments

The last time Chazot checked the literature on using the 1070 wavelength on human dementia patients, he states, about 400 people were taking part in four studies, including his own initial clinical trials in the US