‘It appears magical’: does light therapy actually deliver clearer skin, healthier teeth, and more resilient joints?

Light-based treatment is certainly having a surge in popularity. There are now available illuminated devices targeting issues like complexion problems and aging signs along with sore muscles and oral inflammation, the latest being a dental hygiene device enhanced with tiny red LEDs, promoted by the creators as “a significant discovery in at-home oral care.” Internationally, 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, your body is warmed directly by infrared light. As claimed by enthusiasts, it feels similar to a full-body light therapy session, stimulating skin elasticity, soothing sore muscles, reducing swelling and persistent medical issues while protecting against dementia.

Understanding the Evidence

“It appears somewhat mystical,” says a neuroscience expert, professor in neuroscience at Durham University and a convert to the value of light therapy. Certainly, certain impacts of light on human physiology are proven. Our bodies produce vitamin D through sun exposure, essential for skeletal strength, immune function, and muscular health. Light exposure controls our sleep-wake cycles, additionally, activating brain chemicals and hormonal responses in daylight, and winding down bodily functions for sleep as it fades into night. Daylight-simulating devices frequently help individuals with seasonal depression to combat seasonal emotional slumps. So there’s no doubt we need light energy to function well.

Various Phototherapy Approaches

While Sad lamps tend to use a mixture of light frequencies from the blue end of the spectrum, consumer light therapy products mostly feature red and infrared emissions. In serious clinical research, including research on infrared’s impact on neural cells, finding the right frequency is key. Photons represent electromagnetic waves, spanning from low-energy radio waves to short-wavelength gamma rays. Light-based treatment utilizes intermediate light frequencies, with ultraviolet representing the higher energy invisible light, followed by visible light encompassing rainbow colors and then infrared (which we can see with night-vision goggles).

Ultraviolet treatment has been employed by skin specialists for decades to treat chronic skin conditions such as eczema, psoriasis and vitiligo. It modulates intracellular immune mechanisms, “and suppresses swelling,” explains Dr Bernard Ho. “Substantial research supports light therapy.” UVA penetrates skin more deeply than UVB, in contrast to LEDs in commercial products (typically emitting red, infrared or blue wavelengths) “typically have shallower penetration.”

Safety Protocols and Medical Guidance

UVB radiation effects, like erythema or pigmentation, are understood but clinical devices employ restricted wavelength ranges – signifying focused frequency bands – which minimises the risks. “It’s supervised by a healthcare professional, thus exposure is controlled,” says Ho. Most importantly, the lightbulbs are calibrated by medical technicians, “to ensure that the wavelength that’s being delivered is fit for purpose – different from beauty salons, where regulations may be lax, and we don’t really know what wavelengths are being used.”

Home Devices and Scientific Uncertainty

Colored light diodes, he notes, “don’t have strong medical applications, though they might benefit some issues.” Red wavelength therapy, proponents claim, help boost blood circulation, oxygen absorption and skin cell regeneration, and promote collagen synthesis – a primary objective in youth preservation. “The evidence is there,” states the dermatologist. “But it’s not conclusive.” Regardless, amid the sea of devices now available, “it’s unclear if device outputs match study parameters. Appropriate exposure periods aren’t established, ideal distance from skin surface, the risk-benefit ratio. Numerous concerns persist.”

Specific Applications and Professional Perspectives

Early blue-light applications focused on skin microbes, bacteria linked to pimples. Research support isn’t sufficient for standard medical recommendation – even though, says Ho, “it’s often seen in medical spas or aesthetics practices.” Individuals include it in their skincare practices, he mentions, though when purchasing home devices, “we advise cautious experimentation and safety verification. If it’s not medically certified, standards are somewhat unclear.”

Cutting-Edge Studies and Biological Processes

At the same time, in advanced research areas, Chazot has been experimenting with brain cells, identifying a number of ways in which infrared can boost cellular health. “Pretty much everything I did with the light at that particular wavelength was positive and protective,” he states. The numerous reported benefits have generated doubt regarding phototherapy – that results appear unrealistic. Yet, experimental evidence has transformed his viewpoint.

The researcher primarily focuses on pharmaceutical solutions for brain disorders, however two decades past, a doctor developing photonic antiviral treatment consulted his scientific background. “He designed tools for biological testing,” he says. “I was pretty sceptical. It was an unusual wavelength of about 1070 nanometres, which most thought had no biological effect.”

Its beneficial characteristic, though, was that it travelled through water easily, meaning it could penetrate the body more deeply.

Cellular Energy and Neurological Benefits

Growing data suggested infrared influenced energy-producing organelles. Mitochondria are the powerhouses of cells, producing fuel for biological processes. “Mitochondria exist throughout the body, particularly in neural cells,” notes the researcher, who, as a neuroscientist, decided to focus the research on brain cells. “It has been shown that in humans this light therapy increases blood flow into the brain, which is generally advantageous.”

With 1070 treatment, cellular power plants create limited oxidative molecules. At controlled levels these compounds, says Chazot, “triggers guardian proteins that maintain organelle health, look after your cells and also deal with the unwanted proteins.”

All of these mechanisms appear promising for treating a brain disease: antioxidant, inflammation reduction, and cellular cleanup – self-digestion mechanisms eliminating harmful elements.

Current Research Status and Professional Opinions

When recently reviewing 1070nm research for cognitive decline, he reports, several hundred individuals participated in various investigations, including his own initial clinical trials in the US