‘It appears magical’: does light therapy actually deliver clearer skin, healthier teeth, and more resilient joints?

Light-based treatment is clearly enjoying a wave of attention. There are now available light-emitting tools targeting issues like dermatological concerns and fine lines to aching tissues and periodontal issues, the latest being a dental hygiene device enhanced with tiny red LEDs, promoted by the creators as “a major advance in personal mouth health.” Internationally, 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, your body is warmed directly by infrared light. As claimed by enthusiasts, the experience resembles using an LED facial mask, boosting skin collagen, relaxing muscles, alleviating inflammatory responses and persistent medical issues while protecting against dementia.

The Science and Skepticism

“It feels almost magical,” says a neuroscience expert, a scientist who has studied phototherapy extensively. Naturally, certain impacts of light on human physiology are proven. Sunlight helps us make vitamin D, crucial for strong bones, immune defense, and tissue repair. Light exposure controls our sleep-wake cycles, 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 combat seasonal emotional slumps. So there’s no doubt we need light energy to function well.

Types of Light Therapy

Although mood lamps generally utilize blue-spectrum frequencies, most other light therapy devices deploy red or infrared light. In serious clinical research, like examinations of infrared influence on cerebral tissue, finding the right frequency is key. Light is a form of electromagnetic radiation, spanning from low-energy radio waves to high-energy gamma radiation. Phototherapy, or light therapy uses wavelengths around the middle of this spectrum, with ultraviolet representing the higher energy invisible light, then the visible spectrum we perceive as colors 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 affects cellular immune responses, “and dampens down inflammation,” notes Dr Bernard Ho. “There’s lots of evidence for phototherapy.” 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.”

Risk Assessment and Professional Supervision

UVB radiation effects, such as burning or tanning, are well known but in medical devices the light is delivered in a “narrow-band” form – meaning smaller wavelengths – which minimises the risks. “Therapy is overseen by qualified practitioners, thus exposure is controlled,” explains the dermatologist. Essentially, the light sources are adjusted by technical experts, “to confirm suitable light frequency output – as opposed to commercial tanning facilities, where oversight might be limited, and wavelength accuracy isn’t verified.”

Commercial Products and Research Limitations

Red and blue light sources, he explains, “don’t have strong medical applications, but could assist with specific concerns.” Red light devices, some suggest, improve circulatory function, oxygen uptake and skin cell regeneration, and stimulate collagen production – a primary objective in youth preservation. “Research exists,” comments the expert. “However, it’s limited.” Regardless, with numerous products on the market, “it’s unclear if device outputs match study parameters. We don’t know the duration, proper positioning requirements, whether or not that will increase the risk versus the benefit. Many uncertainties remain.”

Specific Applications and Professional Perspectives

One of the earliest blue-light products targeted Cutibacterium acnes, a microbe associated with acne. Scientific backing remains inadequate for regular prescription – despite the fact that, says Ho, “it’s commonly used in cosmetic clinics.” Individuals include it in their skincare practices, he observes, however for consumer products, “we just tell them to try it carefully and to make sure it has been assessed for safety. If it’s not medically certified, standards are somewhat unclear.”

Advanced Research and Cellular Mechanisms

Meanwhile, in a far-flung field of pioneering medical science, scientists have been studying cerebral tissue, discovering multiple mechanisms for infrared’s cellular benefits. “Virtually all experiments with specific wavelengths showed beneficial and safeguarding effects,” he reports. Multiple claimed advantages have created skepticism toward light treatment – 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 GP who was developing an antiviral light treatment for cold sores sought his expertise as a biologist. “He developed equipment for cellular and insect experiments,” he recalls. “I remained doubtful. This particular frequency was around 1070 nanometers, which most thought had no biological effect.”

Its beneficial characteristic, though, was its ability to transmit through aqueous environments, allowing substantial bodily penetration.

Mitochondrial Impact and Cognitive Support

Growing data suggested infrared influenced energy-producing organelles. Mitochondria produce ATP for cell function, producing fuel for biological processes. “All human cells contain mitochondria, particularly in neural cells,” notes the researcher, who concentrated on cerebral applications. “It has been shown that in humans this light therapy increases blood flow into the brain, which is always very good.”

With specific frequency application, cellular power plants create limited oxidative molecules. At controlled levels these compounds, explains the expert, “stimulates so-called chaperone proteins which look after your mitochondria, protect cellular integrity and manage defective proteins.”

These processes show potential for neurological conditions: 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 says, about 400 people were taking part in four studies, comprising his early research projects