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Light-based treatment is certainly having a wave of attention. Consumers can purchase illuminated devices designed to address complexion problems and aging signs to sore muscles and oral inflammation, the newest innovation is an oral care tool outfitted with small red light diodes, promoted by the creators as “a major advance in at-home oral care.” Worldwide, the industry reached $1 billion in 2024 and is forecast to expand to $1.8 billion by 2035. Options include full-body infrared sauna sessions, that employ light waves rather than traditional heat sources, your body is warmed directly by infrared light. According to its devotees, it feels similar to a full-body light therapy session, enhancing collagen production, soothing sore muscles, relieving inflammation and persistent medical issues and potentially guarding against cognitive decline.

Research and Reservations

“It feels almost magical,” observes Paul Chazot, who has researched light therapy for two decades. Naturally, we know light influences biological functions. Sunlight enables vitamin D production, needed for bone health, immunity, muscles and more. Sunlight regulates our circadian rhythms, additionally, activating brain chemicals and hormonal responses in daylight, and signaling the body to slow down for nighttime. Artificial sun lamps are a common remedy for people with seasonal affective disorder (Sad) to combat seasonal emotional slumps. Undoubtedly, light plays a vital role in human health.

Various Phototherapy Approaches

Although mood lamps generally utilize blue-spectrum frequencies, the majority of phototherapy tools use red or near-infrared wavelengths. In rigorous scientific studies, 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 short-wavelength gamma rays. Therapeutic light application uses wavelengths around the middle of this spectrum, the highest energy of those being invisible ultraviolet, followed by visible light encompassing rainbow colors and infrared light visible through night vision technology.

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 dampens down inflammation,” explains a dermatology expert. “Substantial research supports light therapy.” UVA penetrates skin more deeply than UVB, whereas the LEDs we see on consumer light-therapy devices (which generally deliver red, infrared or blue light) “generally affect surface layers.”

Safety Protocols and Medical Guidance

The side-effects of UVB exposure, such as burning or tanning, are well known but in medical devices the light is delivered in a “narrow-band” form – signifying focused frequency bands – that reduces potential hazards. “Treatment is monitored by medical staff, thus exposure is controlled,” says Ho. Essentially, the devices are tuned by qualified personnel, “to ensure that the wavelength that’s being delivered is fit for purpose – different from beauty salons, where regulations may be lax, and wavelength accuracy isn’t verified.”

Commercial Products and Research Limitations

Red and blue LEDs, he explains, “aren’t really used in the medical sense, but they may help with certain conditions.” Red wavelength therapy, proponents claim, enhance blood flow, oxygen utilization and cell renewal in the skin, and activate collagen formation – an important goal for anti-aging. “Research exists,” comments the expert. “But it’s not conclusive.” In any case, given the plethora of available tools, “we’re uncertain whether commercial devices replicate research conditions. Optimal treatment times are unknown, proper positioning requirements, the risk-benefit ratio. Numerous concerns persist.”

Treatment Areas and Specialist Views

Initial blue-light devices addressed acne bacteria, microorganisms connected to breakouts. The evidence for its efficacy isn’t strong enough for it to be routinely prescribed by doctors – even though, says Ho, “it’s commonly used in cosmetic clinics.” Individuals include it in their skincare practices, he says, though when purchasing home devices, “we advise cautious experimentation and safety verification. Without proper medical classification, standards are somewhat unclear.”

Advanced Research and Cellular Mechanisms

Simultaneously, in a far-flung field of pioneering medical science, 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 results appear unrealistic. Yet, experimental evidence has transformed his viewpoint.

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 developed equipment for cellular and insect experiments,” he explains. “I was quite suspicious. It was an unusual wavelength of about 1070 nanometres, which most thought had no biological effect.”

What it did have going for it, however, was its efficient water penetration, enabling deeper tissue penetration.

Mitochondrial Effects and Brain Health

Additional research indicated infrared affected cellular mitochondria. Mitochondria are the powerhouses of cells, creating power for cellular operations. “All human cells contain mitochondria, including the brain,” explains the neuroscientist, who prioritized neurological investigations. “Studies demonstrate enhanced cerebral circulation with light treatment, which is always very good.”

With specific frequency application, energy organelles generate minimal reactive oxygen compounds. In low doses this substance, says Chazot, “stimulates so-called chaperone proteins which look after your mitochondria, preserve cell function and eliminate damaged proteins.”

All of these mechanisms appear promising for treating a brain disease: antioxidant, anti-inflammatory, and pro-autophagy – autophagy being the process the cell uses to clear unwanted damaging proteins.

Current Research Status and Professional Opinions

When recently reviewing 1070nm research for cognitive decline, he reports, several hundred individuals participated in various investigations, comprising his early research projects