Using Red Light to Improve Metabolism & the Harmful Effects of LEDs | Dr. Glen Jeffery

Key Takeaways

Long-wavelength red and infrared light can penetrate the body to enhance mitochondrial function, improving metabolism, vision, and mood.
Mitochondrial health is dependent on a balance of light wavelengths, with long wavelengths supporting cellular function and protection.
Excessive exposure to short-wavelength light, particularly from LEDs, can impair mitochondrial health and disrupt metabolic regulation.
Localized application of long-wavelength light can produce systemic benefits, affecting blood glucose, neuroprotection, and overall cell survival.
Optimizing light environments, both natural and artificial, is crucial for mitigating health risks associated with modern living.
Early intervention with long-wavelength light therapy shows promise for age-related conditions and mitochondrial diseases.

Short-wavelength light, such as deep blues and violets, has higher energy capable of causing sunburn and altering DNA below UV.
The eye's lens and cornea block short wavelengths; excessive UV exposure can cause corneal sunburn (snowblindness) and lead to cataracts over time.
Post-cataract surgery, clear lens implants initially enhance vision due to increased light penetration, a perception that diminishes as the brain re-adapts.
Research by Richard Weller suggests moderate sunlight exposure is linked to lower all-cause mortality, with skin cancer primarily associated with severe sunburns.

Long-wavelength light indirectly impacts mitochondria by affecting the water surrounding them, leading to increased energy (ATP) production and synthesis of mitochondrial proteins.
Mitochondria, believed to have originated as independent bacterial organisms in aquatic environments, likely evolved to absorb long-wavelength light.
Improvements in cellular function from long-wavelength light correlate with water's absorption spectrum, an insight previously overlooked by researchers.

Dr. Glen Jeffery presented a study where illuminating a small skin area with long-wavelength light altered blood glucose response, suggesting systemic effects.
An initial experiment on bumblebees showed red light decreased blood glucose spikes while blue light increased them, implying differential mitochondrial effects.
Human trials revealed a significant reduction in peak blood glucose levels after red light was applied to a roughly 4x6 inch rectangle on the body, producing a systemic response.

Research on primates with induced Parkinson's disease showed red light applied to the abdomen significantly reduced disease symptoms, despite the disease originating in the brainstem.
Experiments on aging animals demonstrated that daily red light exposure reduces the rate of cell death in retinal rod photoreceptors, crucial for low-light vision.
Dr. Glen Jeffery explains that mitochondria, often impaired in conditions like Parkinson's, function as a community, where dysfunction in one area can affect others throughout the body.

The application of long-wavelength light, specifically near-infrared and infrared light (650-900 nanometers), can preserve vision and offset visual function loss.
In an experiment, a 3-minute burst of 670 nanometer red light from a flashlight-like device significantly improved participants' color vision, with the effect lasting five days.
This improvement in visual function is a distinct effect, not a dose-response curve, and comparable research findings have been observed in flies and mice.

Dr. Jeffery explains that while sunlight contains long wavelengths, its broad spectrum and lower intensity in specific wavelengths make direct comparison to targeted red light difficult.
Morning sunlight exposure is crucial for setting the circadian rhythm, even on overcast days, as long-wavelength light is present though attenuated by clouds.
Age influences the response to long-wavelength light-emitting devices, with individuals over 40 generally showing more noticeable improvement due to greater room for mitochondrial enhancement.

Long-wavelength light shows promise for improving vision and potentially reversing age-related decline, such as macular degeneration.
Early clinical trials for advanced macular degeneration had limited success, but later research, including work by ophthalmologist Ben Burton, demonstrated significant vision improvement, particularly night vision.
The efficacy of red light therapy for age-related conditions and diseases is critically dependent on early intervention; it is less effective once a condition has significantly progressed.

The guest expresses concern about the detrimental effects of short-wavelength light, particularly from LEDs, on mitochondrial health and potentially blood glucose regulation.
Concerns have been raised to the European Commission that the widespread use of LED lighting may pose a public health risk comparable to asbestos, noting the strong blue light spike in LEDs.
Research on mice and flies exposed to LED lighting indicates detrimental effects on mitochondria, leading to reduced responsiveness, weight gain, fatty liver disease, and abnormal sperm morphology.

The critical factor for mitochondrial health may be the balance of light wavelengths, as an imbalance heavily skewed towards short wavelengths by LEDs can disrupt biological processes.
LEDs save energy by emitting mostly visible light but often possess a strong blue light spike, unlike natural sunlight or older incandescent/flame-based sources.
Dr. Jeffery questions whether commercially available 'sunlight mimicking' LEDs truly replicate the full spectrum of sunlight, noting most lack significant long-wavelength light.

A study in windowless buildings with harsh LED lighting showed that staff using 40-watt incandescent desk lamps experienced significant improvement in red and blue color perception for at least a month.
Cost-cutting in building construction often installs cheap, spectrum-restricted LEDs and infrared-blocking glass, creating a double impact on mitochondrial health.
A major architecture firm has begun prioritizing healthy lighting, evidenced by a project to replace LEDs with a healthier lighting system in a large office space.

The importance of natural light in classrooms is emphasized, with a recommendation against tinted windows.
For artificial lighting, dimmable incandescent lights are suggested as a cost-effective way to provide beneficial infrared light, even at low perceived brightness.
Plant matter reflects infrared light, which can influence temperature and improve well-being; planting trees in a city led to a significant reduction in blood markers of inflammation.

Low-cost strategies for improving health include dimming LED lighting in the evening, avoiding overhead lights, and prioritizing morning sunlight.
Odorless beeswax candles and dimmed incandescent or halogen lamps are suggested for their balanced or long-wavelength light properties in indoor environments.
In a clinical trial for children with mitochondrial disease, one child experienced a significant improvement within a month of light therapy, regaining semi-mobility and ability to walk to school.