Using Red Light to Improve Metabolism & the Harmful Effects of LEDs | Dr. Glen Jeffery
Red light exposure for just 3 minutes in the morning can improve color vision by 20% for up to 5 days by enhancing mitochondrial function. Meanwhile, excessive blue LED light exposure throughout the day may be damaging our mitochondria at levels comparable to asbestos exposure, affecting blood sugar
2h 14mKey Takeaway
Red light exposure for just 3 minutes in the morning can improve color vision by 20% for up to 5 days by enhancing mitochondrial function. Meanwhile, excessive blue LED light exposure throughout the day may be damaging our mitochondria at levels comparable to asbestos exposure, affecting blood sugar regulation, liver health, and longevity.
Episode Overview
Dr. Glenn Jeffrey, a neuroscience professor at University College London, discusses how different wavelengths of light profoundly impact mitochondrial function and overall health. The conversation covers the benefits of red/near-infrared light for vision, blood sugar regulation, and cellular health, while warning about the potential dangers of excessive blue LED light exposure that dominates modern indoor environments.
Key Insights
Long-wavelength light penetrates deep into the body
Red and near-infrared light can pass completely through the human body, even through bone and clothing. This light scatters inside the body and affects mitochondria in all organs, not just at the surface where it's applied.
Water absorption is key to mitochondrial benefits
Long-wavelength light is absorbed by water surrounding mitochondria, changing water's viscosity and allowing the ATP-producing motors to spin faster. This explains why mitochondria themselves don't directly absorb red light, but still benefit dramatically from exposure.
Morning timing maximizes red light effectiveness
Red light therapy is most effective in the morning hours (sunrise to 11 AM) when mitochondria are naturally producing the most ATP. Effects are minimal in the afternoon when mitochondria are performing other cellular maintenance functions.
LED lighting may be causing systemic health problems
Modern LED lights contain high amounts of blue light without balancing red wavelengths, potentially causing mitochondrial dysfunction comparable to asbestos exposure. This may contribute to metabolic disorders, fatty liver, and reduced lifespan observed since 2010.
Early intervention is crucial for light therapy benefits
Red light therapy can slow aging and disease progression, but cannot reverse damage once disease has progressed significantly. Early intervention with appropriate light exposure is critical for maintaining mitochondrial health throughout life.
Notable Quotes
"This is an issue on the same level as asbestos. This is a public health issue and it's big."
"When we use LEDs, the light found in LEDs, when we use them, certainly when we use them on the retiny looking at mice, we can watch the mitochondria gently go downhill."
"Your body has never experienced such confined limited spectrum of light. Never experienced it before."
"Get a dog, right? Get a dog because you'll have to go out in daylight two or three times a day."
Action Items
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1
Use red light therapy in the morning
Expose eyes to 670+ nanometer red light for 3 minutes each morning (eyes can be closed). Use a simple red LED flashlight at comfortable distance for 5-day lasting vision and metabolic benefits.
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2
Replace LED bulbs with incandescent or halogen
Switch to halogen desk lamps or remaining incandescent bulbs to provide full-spectrum light that supports mitochondrial function, especially in windowless environments.
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3
Maximize daily sunlight exposure
Spend time outdoors daily to get balanced short and long-wavelength light. Even on cloudy days, natural light provides better spectral balance than artificial LED lighting.
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4
Apply red light to specific body areas for targeted benefits
For blood sugar regulation, apply red light to a small area of the back for systemic effects. For vision, focus on eye area. Effects take 1-2 hours locally, 24+ hours systemically.