‘It seems like sorcery’: is light therapy truly capable of improving your skin, whitening your teeth, and strengthening your joints?

Light-based treatment is certainly having a wave of attention. There are now available glowing gadgets designed to address dermatological concerns and fine lines along with muscle pain and gum disease, the latest being an oral care tool enhanced with tiny red LEDs, described by its makers as “a significant discovery for domestic dental hygiene.” Globally, 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, which use infrared light to warm the body directly, the infrared radiation heats your body itself. Based on supporter testimonials, it feels similar to a full-body light therapy session, enhancing collagen production, easing muscle tension, reducing swelling and chronic health conditions as well as supporting brain health.

The Science and Skepticism

“It feels almost magical,” says a Durham University professor, who has researched light therapy for two decades. Naturally, some of light’s effects on our bodies are well established. Sunlight helps us make vitamin D, crucial for strong bones, immune defense, and tissue repair. Sunlight regulates our circadian rhythms, as well, triggering the release of neurochemicals and hormones while we are awake, and preparing the body for rest as darkness falls. Sunlight-imitating lamps frequently help individuals with seasonal depression to boost low mood in winter. Undoubtedly, light plays a vital role in human health.

Various Phototherapy Approaches

Although mood lamps generally utilize blue-spectrum frequencies, consumer light therapy products mostly feature red and infrared emissions. In rigorous scientific studies, such as Chazot’s investigations into the effects of infrared on brain cells, determining the precise frequency is essential. Light constitutes electromagnetic energy, spanning from low-energy radio waves to the highest-energy (gamma waves). Phototherapy, or light therapy uses wavelengths around the middle of this spectrum, the highest energy of those being invisible ultraviolet, followed by visible light encompassing rainbow colors and then infrared (which we can see with night-vision goggles).

Dermatologists have utilized UV therapy for extensive periods for addressing long-term dermatological issues like vitiligo. It affects cellular immune responses, “and suppresses swelling,” says a skin specialist. “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) “generally affect surface layers.”

Risk Assessment and Professional Supervision

UVB radiation effects, including sunburn or skin darkening, are recognized but medical equipment uses controlled narrow-band delivery – signifying focused frequency bands – which decreases danger. “It’s supervised by a healthcare professional, thus exposure is controlled,” says Ho. Essentially, the lightbulbs are calibrated by medical technicians, “to confirm suitable light frequency output – as opposed to commercial tanning facilities, where oversight might be limited, and we don’t really know what wavelengths are being used.”

Home Devices and Scientific Uncertainty

Colored light diodes, he explains, “don’t have strong medical applications, though they might benefit some issues.” Red light devices, some suggest, improve circulatory function, oxygen absorption and skin cell regeneration, and promote collagen synthesis – a key aspiration in anti-ageing effects. “Research exists,” comments the expert. “However, it’s limited.” Nevertheless, 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, ideal distance from skin surface, whether or not that will increase the risk versus the benefit. There are lots of questions.”

Specific Applications and Professional Perspectives

One of the earliest blue-light products targeted Cutibacterium acnes, microorganisms connected to breakouts. Scientific backing remains inadequate for regular prescription – although, says Ho, “it’s frequently employed in beauty centers.” Individuals include it in their skincare practices, he observes, though when purchasing home devices, “we advise cautious experimentation and safety verification. Unless it’s a medical device, standards are somewhat unclear.”

Cutting-Edge Studies and Biological Processes

Simultaneously, in innovative scientific domains, 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 states. Multiple claimed advantages have created skepticism toward light treatment – 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 GP who was developing an antiviral light treatment for cold sores sought his expertise as a biologist. “He designed tools for biological testing,” he recalls. “I was quite suspicious. It was an unusual wavelength of about 1070 nanometres, that nobody believed did anything biological.”

The advantage it possessed, though, was its efficient water penetration, meaning it could penetrate the body more deeply.

Mitochondrial Impact and Cognitive Support

Growing data suggested infrared influenced energy-producing organelles. Mitochondria are the powerhouses of cells, creating power for cellular operations. “Mitochondria exist throughout the body, including the brain,” says Chazot, who prioritized neurological investigations. “Studies demonstrate enhanced cerebral circulation with light treatment, which is consistently beneficial.”

Using 1070nm wavelength, energy organelles generate minimal reactive oxygen compounds. At controlled levels these compounds, explains the expert, “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, anti-inflammatory, and pro-autophagy – autophagy being the process the cell uses to clear unwanted damaging proteins.

Present Investigation Status and Expert Assessments

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