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Light-based treatment is definitely experiencing a moment. You can now buy illuminated devices for everything from skin conditions and wrinkles along with aching tissues and oral inflammation, the newest innovation is an oral care tool enhanced with tiny red LEDs, described by its makers as “a breakthrough for domestic dental hygiene.” Worldwide, the industry reached $1 billion in 2024 and is forecast to expand to $1.8 billion by 2035. There are even infrared saunas available, which use infrared light to warm the body directly, your body is warmed directly by infrared light. As claimed by enthusiasts, it’s like bathing in one of those LED-lit beauty masks, stimulating skin elasticity, relaxing muscles, alleviating inflammatory responses and persistent medical issues as well as supporting brain health.

Research and Reservations

“It sounds a bit like witchcraft,” says a Durham University professor, who has researched light therapy for two decades. Certainly, we know light influences biological functions. Sunlight helps us make vitamin D, crucial for strong bones, immune defense, and tissue repair. Sunlight regulates our circadian rhythms, as well, stimulating neurotransmitter and hormone production during daytime, and winding down bodily functions for sleep as it fades into night. 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, consumer light therapy products mostly feature red and infrared emissions. In rigorous scientific studies, like examinations of infrared influence on cerebral tissue, finding the right frequency is key. Light constitutes electromagnetic energy, extending from long-wavelength radiation to short-wavelength gamma rays. Therapeutic light application utilizes intermediate light frequencies, with ultraviolet representing the higher energy invisible light, 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 dampens down inflammation,” 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 (which generally deliver red, infrared or blue light) “typically have shallower penetration.”

Safety Considerations and Medical Oversight

The side-effects of UVB exposure, like erythema or pigmentation, are well known but in medical devices the light is delivered in a “narrow-band” form – indicating limited wavelength spectrum – which decreases danger. “Treatment is monitored by medical staff, meaning intensity is regulated,” says Ho. Essentially, the light sources are adjusted by technical experts, “to confirm suitable light frequency output – different from beauty salons, where regulations may be lax, and wavelength accuracy isn’t verified.”

Home Devices and Scientific Uncertainty

Red and blue LEDs, he says, “aren’t typically employed clinically, though they might benefit some issues.” Red light devices, some suggest, help boost blood circulation, oxygen uptake and skin cell regeneration, and activate collagen formation – an important goal for anti-aging. “The evidence is there,” says Ho. “But it’s not conclusive.” Nevertheless, given the plethora of available tools, “we don’t know whether or not the lights emitted are reflective of the research that has been done. Appropriate exposure periods aren’t established, proper positioning requirements, the risk-benefit ratio. Numerous concerns persist.”

Specific Applications and Professional Perspectives

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 – although, notes the dermatologist, “it’s commonly used in cosmetic clinics.” Individuals include it in their skincare practices, he mentions, but if they’re buying a device for home use, “we advise cautious experimentation and safety verification. If it’s not medically certified, oversight remains ambiguous.”

Cutting-Edge Studies and Biological Processes

At the same time, in advanced research areas, researchers have been testing neural cells, identifying a number of ways in which infrared can boost cellular health. “Nearly every test with precise light frequencies demonstrated advantageous outcomes,” he reports. The numerous reported benefits have generated doubt regarding phototherapy – that results appear unrealistic. However, scientific investigation has altered his perspective.

The researcher primarily focuses on pharmaceutical solutions for brain disorders, but over 20 years ago, a doctor developing photonic antiviral treatment consulted his scientific background. “He designed tools for biological testing,” he explains. “I was pretty sceptical. The specific wavelength measured approximately 1070nm, that nobody believed did anything biological.”

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

Cellular Energy and Neurological Benefits

More evidence was emerging at the time that infrared light targeted the mitochondria in cells. Mitochondria are the powerhouses of cells, producing fuel for biological processes. “All human cells contain mitochondria, particularly in neural cells,” notes the researcher, who, as a neuroscientist, decided to focus the research on brain cells. “Research confirms improved brain blood flow with phototherapy, which is consistently beneficial.”

With 1070 treatment, cellular power plants create limited oxidative molecules. In limited quantities these molecules, says Chazot, “triggers guardian proteins that maintain organelle health, protect cellular integrity and manage defective proteins.”

These processes show potential for neurological conditions: oxidative protection, anti-inflammatory, and pro-autophagy – autophagy being the process the cell uses to clear unwanted damaging proteins.

Ongoing Study Progress and Specialist Evaluations

When recently reviewing 1070nm research for cognitive decline, he states, about 400 people were taking part in four studies, comprising his early research projects