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

Phototherapy is clearly enjoying a wave of attention. There are now available glowing gadgets targeting issues like complexion problems and aging signs to muscle pain and gum disease, the latest being an oral care tool enhanced with miniature red light sources, promoted by the creators as “a major advance for domestic dental hygiene.” 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, that employ light waves rather than traditional heat sources, the infrared radiation heats your body itself. As claimed by enthusiasts, the experience resembles using an LED facial mask, enhancing collagen production, easing muscle tension, alleviating inflammatory responses and chronic health conditions while protecting against dementia.

The Science and Skepticism

“It sounds a bit like witchcraft,” says a neuroscience expert, a scientist who has studied phototherapy extensively. Of course, we know light influences biological functions. Sunlight helps us make vitamin D, crucial for strong bones, immune defense, and tissue repair. Light exposure controls our sleep-wake cycles, as well, triggering the release of neurochemicals and hormones while we are awake, and signaling the body to slow down for nighttime. Daylight-simulating devices are standard treatment for winter mood disorders to boost low mood in winter. Clearly, light energy is essential for optimal functioning.

Various Phototherapy Approaches

Although mood lamps generally utilize blue-spectrum frequencies, the majority of phototherapy tools use red or near-infrared wavelengths. In serious clinical research, including research on infrared’s impact on neural cells, determining the precise frequency is essential. Light constitutes electromagnetic energy, extending from long-wavelength radiation to high-energy gamma radiation. Therapeutic light application employs mid-spectrum wavelengths, including invisible ultraviolet radiation, 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 to manage persistent skin disorders including eczema and psoriasis. It modulates intracellular immune mechanisms, “and reduces inflammatory processes,” explains a dermatology expert. “Considerable data validates phototherapy.” UVA goes deeper into the skin than UVB, whereas the LEDs we see on consumer light-therapy devices (usually producing colored light emissions) “tend to be a bit more superficial.”

Safety Protocols and Medical Guidance

UVB radiation effects, like erythema or pigmentation, are understood but clinical devices employ restricted wavelength ranges – meaning smaller wavelengths – which minimises the risks. “Therapy is overseen by qualified practitioners, thus exposure is controlled,” says Ho. And crucially, the devices are tuned by qualified personnel, “to ensure that the wavelength that’s being delivered is fit for purpose – unlike in tanning salons, where regulations may be lax, and we don’t really know what wavelengths are being used.”

Consumer Devices and Evidence Gaps

Red and blue light sources, he says, “aren’t typically employed clinically, but could assist with specific concerns.” Red LEDs, it is proposed, improve circulatory function, oxygen utilization and skin cell regeneration, and stimulate collagen production – an important goal for anti-aging. “Research exists,” comments the expert. “Although it’s not strong.” Regardless, given the plethora of available tools, “we’re uncertain whether commercial devices replicate research conditions. Optimal treatment times are unknown, ideal distance from skin surface, whether or not that will increase the risk versus the benefit. Many uncertainties remain.”

Targeted Uses and Expert Opinions

Initial blue-light devices addressed acne bacteria, bacteria linked to pimples. Research support isn’t sufficient for standard medical recommendation – even though, explains the specialist, “it’s often seen in medical spas or aesthetics practices.” Individuals include it in their skincare practices, he observes, but if they’re buying a device for home use, “we recommend careful testing and security confirmation. Unless it’s a medical device, the regulation is a bit grey.”

Innovative Investigations and Molecular Effects

At the same time, in advanced research areas, scientists have been studying cerebral tissue, identifying a number of ways in which infrared can boost cellular health. “Virtually all experiments with specific wavelengths showed beneficial and safeguarding effects,” he states. The numerous reported benefits have generated doubt regarding phototherapy – that results appear unrealistic. But his research has thoroughly changed his mind in that respect.

Chazot mostly works on developing drug treatments for neurodegenerative diseases, however two decades past, a doctor developing photonic antiviral treatment consulted his scientific background. “He created some devices so that we could work with them with cells and with fruit flies,” he explains. “I was quite suspicious. It was an unusual wavelength of about 1070 nanometres, which most thought had no biological effect.”

The advantage it possessed, though, was its efficient water penetration, allowing substantial bodily penetration.

Cellular Energy and Neurological Benefits

More evidence was emerging at the time that infrared light targeted the mitochondria in cells. These organelles generate cellular energy, generating energy for them to function. “All human cells contain mitochondria, even within brain tissue,” 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 generally advantageous.”

With specific frequency application, energy organelles generate minimal reactive oxygen compounds. In low doses this substance, says Chazot, “stimulates so-called chaperone proteins which look after your mitochondria, protect cellular integrity and manage defective proteins.”

These processes show potential for neurological conditions: antioxidant, anti-inflammatory, and cellular cleanup – autophagy representing cellular waste disposal.

Current Research Status and Professional Opinions

When recently reviewing 1070nm research for cognitive decline, he states, about 400 people were taking part in four studies, incorporating his preliminary American studies