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Light-based treatment is definitely experiencing a wave of attention. Consumers can purchase illuminated devices targeting issues like skin conditions and wrinkles along with sore muscles and gum disease, recently introduced is a dental hygiene device equipped with small red light diodes, marketed by the company as “a significant discovery for domestic dental hygiene.” Worldwide, the sector valued at $1bn last year is expected to increase to $1.8bn within the next decade. There are even infrared saunas available, which use infrared light to warm the body directly, the infrared radiation heats your body itself. Based on supporter testimonials, the experience resembles using an LED facial mask, boosting skin collagen, soothing sore muscles, alleviating inflammatory responses and long-term ailments as well as supporting brain health.

The Science and Skepticism

“It appears somewhat mystical,” notes a neuroscience expert, professor in neuroscience at Durham University and a convert to the value of light therapy. Of course, some of light’s effects on our bodies are well established. Our bodies produce vitamin D through sun exposure, needed for bone health, immunity, muscles and more. Sunlight regulates our circadian rhythms, additionally, triggering the release of neurochemicals and hormones while we are awake, and preparing the body for rest as darkness falls. Artificial sun lamps frequently help individuals with seasonal depression to boost low mood in winter. Undoubtedly, light plays a vital role in human health.

Types of Light Therapy

Whereas seasonal affective disorder devices typically employ blue-range light, the majority of phototherapy tools use red or near-infrared wavelengths. In serious clinical research, 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 short-wavelength gamma rays. Light-based treatment uses wavelengths around the middle of this spectrum, with ultraviolet representing the higher energy invisible light, then visible light (all the colours we see in a rainbow) and finally infrared detectable with special equipment.

UV light has been used by medical dermatologists for many years to manage persistent skin disorders including eczema and psoriasis. It modulates intracellular immune mechanisms, “and suppresses swelling,” says a dermatology expert. “Considerable data validates phototherapy.” UVA penetrates skin more deeply than UVB, whereas the LEDs we see on consumer light-therapy devices (typically emitting red, infrared or blue wavelengths) “tend to be a bit more superficial.”

Safety Considerations and Medical Oversight

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 – meaning smaller wavelengths – that reduces potential hazards. “Treatment is monitored by medical staff, meaning intensity is regulated,” explains the dermatologist. And crucially, the light sources are adjusted by technical experts, “to ensure that the wavelength that’s being delivered is fit for purpose – as opposed to commercial tanning facilities, where it’s a bit unregulated, and we don’t really know what wavelengths are being used.”

Commercial Products and Research Limitations

Colored light diodes, he explains, “don’t have strong medical applications, but they may help with certain conditions.” Red wavelength therapy, proponents claim, enhance blood flow, oxygen absorption and cell renewal in the skin, and stimulate collagen production – a primary objective in youth preservation. “Research exists,” states the dermatologist. “But it’s not conclusive.” Regardless, amid the sea of devices now available, “we don’t know whether or not the lights emitted are reflective of the research that has been done. We don’t know the duration, proper positioning requirements, the risk-benefit ratio. Numerous concerns persist.”

Targeted Uses and Expert Opinions

One of the earliest blue-light products targeted Cutibacterium acnes, bacteria linked to pimples. Scientific backing remains inadequate for regular prescription – despite the fact that, explains the specialist, “it’s commonly used in cosmetic clinics.” Certain patients incorporate it into their regimen, he says, but if they’re buying a device for home use, “we recommend careful testing and security confirmation. If it’s not medically certified, the regulation is a bit grey.”

Innovative Investigations and Molecular Effects

At the same time, in advanced research areas, researchers have been testing neural cells, revealing various pathways for light-enhanced cell function. “Nearly every test with precise light frequencies demonstrated advantageous outcomes,” he says. Multiple claimed advantages have created skepticism toward light treatment – that results appear unrealistic. However, scientific investigation has altered his perspective.

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 designed tools for biological testing,” he explains. “I was pretty sceptical. The specific wavelength measured approximately 1070nm, which most thought had no biological effect.”

Its beneficial characteristic, however, was its ability to transmit through aqueous environments, enabling deeper tissue penetration.

Cellular Energy and Neurological Benefits

Growing data suggested infrared influenced energy-producing organelles. These organelles generate cellular energy, generating energy for them to function. “Mitochondria exist throughout the body, even within brain tissue,” 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 always very good.”

With 1070 treatment, mitochondria also produce a small amount of a molecule known as reactive oxygen species. In low doses this substance, notes the scientist, “triggers guardian proteins that maintain organelle health, preserve cell function and eliminate damaged proteins.”

All of these mechanisms appear promising for treating a brain disease: oxidative protection, 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 states, approximately 400 participants enrolled in multiple trials, comprising his early research projects