‘It sounds like witchcraft’: can light therapy really give you better skin, cleaner teeth, stronger joints?

Phototherapy is definitely experiencing a wave of attention. Consumers can purchase glowing gadgets targeting issues like complexion problems and aging signs as well as sore muscles and periodontal issues, recently introduced is a dental hygiene device outfitted with miniature red light sources, described by its makers as “a breakthrough in at-home oral care.” Worldwide, the sector valued at $1bn last year is expected to increase to $1.8bn within the next decade. 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, the experience resembles using an LED facial mask, enhancing collagen production, relaxing muscles, relieving inflammation and long-term ailments while protecting against dementia.

The Science and Skepticism

“It sounds a bit like witchcraft,” notes a Durham University professor, who has researched light therapy for two decades. Of course, certain impacts of light on human physiology are proven. Our bodies produce vitamin D through sun exposure, crucial for strong bones, immune defense, and tissue repair. Natural light synchronizes our biological clocks, as well, 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 elevate spirits during colder months. Undoubtedly, light plays a vital role in human health.

Various Phototherapy Approaches

Whereas seasonal affective disorder devices typically employ blue-range light, most other light therapy devices deploy red or infrared light. In serious clinical research, like examinations of infrared influence on cerebral tissue, determining the precise frequency is essential. Light is a form of electromagnetic radiation, spanning from low-energy radio waves to the highest-energy (gamma waves). Phototherapy, or light therapy employs mid-spectrum wavelengths, the highest energy of those being invisible ultraviolet, then visible light (all the colours we see in a rainbow) 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 modulates intracellular immune mechanisms, “and reduces inflammatory processes,” notes Dr Bernard Ho. “Considerable data validates phototherapy.” UVA reaches deeper skin layers compared to UVB, whereas the LEDs we see on consumer light-therapy devices (which generally deliver red, infrared or blue light) “generally affect surface layers.”

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 – that reduces potential hazards. “It’s supervised by a healthcare professional, thus exposure is controlled,” explains the dermatologist. Essentially, the devices are tuned by qualified personnel, “to confirm suitable light frequency output – different from beauty salons, where oversight might be limited, and emission spectra aren’t confirmed.”

Consumer Devices and Evidence Gaps

Red and blue LEDs, he explains, “aren’t typically employed clinically, though they might benefit some issues.” Red light devices, some suggest, help boost blood circulation, oxygen utilization and skin cell regeneration, and stimulate collagen production – an important goal for anti-aging. “The evidence is there,” states the dermatologist. “Although it’s not strong.” In any case, with numerous products on the market, “it’s unclear if device outputs match study parameters. We don’t know the duration, proper positioning requirements, the risk-benefit ratio. Many uncertainties remain.”

Treatment Areas and Specialist Views

Initial blue-light devices addressed acne bacteria, bacteria linked to pimples. Scientific backing remains inadequate for regular prescription – despite the fact that, says Ho, “it’s commonly used in cosmetic clinics.” Some of his patients use it as part of their routine, 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, discovering multiple mechanisms for infrared’s cellular benefits. “Nearly every test with precise light frequencies demonstrated advantageous outcomes,” he states. The numerous reported benefits have generated doubt regarding phototherapy – that it’s too good to be true. Yet, experimental evidence has transformed his viewpoint.

The scientist mainly develops medications for neurological conditions, but over 20 years ago, a doctor developing photonic antiviral treatment consulted his scientific background. “He designed tools for biological testing,” he recalls. “I was pretty sceptical. The specific wavelength measured approximately 1070nm, that nobody believed did anything biological.”

The advantage it possessed, however, was that it travelled through water easily, enabling deeper tissue penetration.

Mitochondrial Effects and Brain Health

More evidence was emerging at the time that infrared light targeted the mitochondria in cells. Mitochondria produce ATP for cell function, creating power for cellular operations. “Mitochondria exist throughout the body, particularly in neural cells,” notes the researcher, who concentrated on cerebral applications. “Research confirms improved brain blood flow with phototherapy, which is always very good.”

Using 1070nm wavelength, energy organelles generate minimal reactive oxygen compounds. In low doses this substance, explains the expert, “activates protective proteins that safeguard mitochondria, look after your cells and also deal with the unwanted proteins.”

All of these mechanisms appear promising for treating a brain disease: oxidative protection, swelling control, and cellular cleanup – self-digestion mechanisms eliminating harmful elements.

Present Investigation Status and Expert Assessments

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