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

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

Huberman Lab

2025/12/01

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

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

Huberman Lab

Huberman Lab

2025/12/01

Overview Shownote Highlights Transcript Chapters Pins

Shownote

Dr. Glen Jeffery, PhD, is a professor of neuroscience at University College London and a leading expert on how different colors (wavelengths) of light impact cellular, organ and overall health. He explains that long-wavelength light (red, near-infrared and...

Highlights

Light is far more than a tool for visibility—it plays a fundamental role in regulating our biology at the cellular level. Emerging research reveals that specific wavelengths can either support or disrupt critical bodily functions, particularly through their effects on mitochondria, the energy powerhouses within our cells.

02:30

Red light can improve skin and eyesight.

06:27

Replacing cataracts with UV-blocking lenses reduces short-wavelength light exposure.

09:56

Deadliest melanomas may occur without sun exposure.

24:17

Improvements in mitochondrial function from long-wavelength light exposure correlate with water's absorption spectrum

28:19

Long-wavelength light passes through multiple layers of clothing regardless of color

32:56

Red light on the back reduces blood glucose spike by over 20% despite localized application.

42:11

Mitochondria can be released from cells similarly to neurotransmitters, suggesting intercellular signaling roles.

45:42

Red light passes through neonates' heads to measure mitochondrial function post-stroke

57:01

A single 3-minute exposure to 670-nm light improves human color vision for up to five days

59:28

One can't achieve the same biological effects with single-wavelength light as with sunlight.

1:06:56

Mitochondria do more than just make energy

1:08:05

Dim red light (1 mW/cm²) at 670 nm can improve vision in aging eyes

1:10:53

Red light improved vision in control subjects despite no effect on macular degeneration patients

1:17:23

Healthy cells transfer mitochondria to sick cells to aid recovery

1:27:51

Excessive short-wavelength light from LEDs may be as harmful to human biology as asbestos exposure

1:31:56

Mitochondria can distinguish between LED and incandescent light due to spectral differences

1:38:08

LEDs claiming 670nm often deviate from advertised specs over time

1:39:07

Color perception improved significantly with 40-watt incandescent desk lamps and remained improved months later

1:54:46

Trees in urban areas reduce blood markers of stress.

1:55:59

Excessive short-wavelength light can cause metabolic and visual dysfunctions

2:01:30

Halogen lamps can be dimmed to save energy without affecting circadian rhythm.

2:05:15

A child with mitochondrial disease showed significant improvement after red light therapy

Chapters

Glen Jeffery

00:00

Light, Ultraviolet (UV), Visible & Infrared (IR) Light

03:12

Light's Impact on the Body & Light, Sunburn, Cataracts

06:25

UV Light, All-Cause Mortality, Skin Cancer

09:55

Sponsors: Wealthfront & Joovv

14:55

Light Impacts Mitochondria Function & Structure, Long-Wavelength Light (Red/IR), Nano Water

17:58

Long-Wavelength Light Passes Through Clothing & Body; Tissue Scattering

25:00

Long-Wavelength Light & Blood Glucose; Mitochondria

30:08

Red Light, Parkinson's Disease, Cell Death; Eye Rods & Aging; Mitochondria Community

36:19

Red/IR Light, Skull & Brain; Safe Non-Ionizing Radiation

42:46

Sponsors: AG1 & Rorra

48:22

Offsetting Retinal Aging, Improve Vision & Long-Wavelength Light

51:04

Tool: Long-Wavelength Light & Preserve Retinal Mitochondria; Sunlight

59:28

Mitochondrial Theory of Aging, Circadian Rhythm & Mitochondria

1:03:50

Tool: Improve Vision with Long-Wavelength Light

1:07:57

Macular Degeneration, Rescuing Vision, Early Intervention

1:10:44

Light Effects at Local vs Distant Tissues, Immune System, Body Communication

1:13:59

Sponsor: Function

1:19:09

Short-Wavelength Light, LED Light, Mitochondria & Serious Health Detriments

1:20:56

Lifespan, LED Lights; Sunlight & Balanced Wavelengths; "Sunlike" Marketing

1:28:39

Fires, Incandescent Lights vs LED Lights, Lasers; Long-Wavelength Devices

1:34:45

Incandescent & Halogen Bulbs, Mitochondria & Built Environments

1:39:07

Windows, Light & Office Work; Screens, Kids & Myopia; Tools: Plants; Lighting

1:45:19

Bring the Outdoors Indoors

1:55:56

Tool: Candlelight; Dim Halogen Lamps

2:00:35

Mitochondrial Diseases, Children & Long-Wavelength Light; Light Bulbs

2:05:06

Zero-Cost Support, YouTube, Spotify & Apple Follow, Reviews & Feedback, Sponsors, Protocols Book, Social Media, Neural Network Newsletter

2:11:53

Transcript

Speaker 2: Let's talk about indoor lighting, because I am very concerned about the amount of short wavelength light that people are exposed to nowadays, especially kids. Speaker 1: This is an issue on the same level as asbestos. This is a public health is...