Prof. Glen Jeffery & Andrew Huberman

Using Red Light to Improve Metabolism & the Harmful Effects of LEDs

Huberman Lab · December 2025 · University College London and Stanford

• Sets out the full solar spectrum, from ultraviolet near 300nm through visible light to infrared near 3000nm, and why we only see a narrow slice of it.
• Describes long-wavelength light being absorbed by water inside mitochondria, and its reported effect on ATP production.
• Presents Jeffery’s finding that brief exposure to 670nm deep red light improved color vision in older adults, with the effect persisting for several days.
• Discusses blood glucose regulation, indoor lighting, and his argument that short-wavelength-heavy LED lighting is harmful.
• Advises against laser devices for general wellness use, and suggests 630–660nm red with 810–850nm near-infrared for panels.

Included deliberately, and critical of LED devices. Prof. Jeffery argues that short-wavelength-heavy light from LEDs is harmful and recommends halogen or incandescent household lighting. Our panels are LED. We include this because you should hear the strongest argument against the technology we use, not only the arguments for it. The red and near-infrared wavelengths he recommends are among the seven our panels carry.

Prof. Michael Hamblin

History and Anti-inflammatory Mechanisms of Photobiomodulation

FOTnS Virtual Conference, Brazil · 35-minute lecture · Portuguese subtitles

• Traces the history of the field from its origins through to current terminology.
• Focuses on the proposed anti-inflammatory mechanisms of photobiomodulation.
• Delivered as an academic conference lecture rather than a promotional interview.

Prof. Michael Hamblin

Photobiomodulation & Photodynamic Therapy

Ricci Flow Nutrition Podcast, episode 14

• Hamblin describes how he entered the field and why he has stayed with it.
• Distinguishes photobiomodulation from photodynamic therapy, two areas often confused.
• A clip from the full episode rather than the complete conversation.

Prof. Michael Hamblin

Photobiomodulation & The Gut

Ricci Flow Nutrition Podcast, episode 11

• Examines what light may do to the community of microbes living in the digestive tract.
• An area of the research that receives far less attention than skin or muscle.
• A clip from the full episode.

Prof. Michael Hamblin

Photobiomodulation for Brain Disorders

Synchrony 2020 · University of Johannesburg

• Conference presentation on research into light applied to neurological conditions.
• Given while Hamblin was Principal Investigator at the Wellman Center for Photomedicine at Massachusetts General Hospital and Associate Professor of Dermatology at Harvard Medical School.
• Concerns clinical research populations, not general wellness use.

Prof. Michael Hamblin

Brain Photobiomodulation

Real Wellness Now, episode 16

• Long-form interview covering light applied to the brain.
• Covers Hamblin’s background at the Wellman Center for Photomedicine.
• Discusses research findings rather than consumer devices.

Prof. Michael Hamblin

Photobiomodulation for Traumatic Brain Injury

Wellman Center for Photomedicine, Harvard Medical School

• Interview on research into photobiomodulation applied to traumatic brain injury.
• Hosted by THOR Photomedicine, a manufacturer of clinical photobiomodulation equipment — note the commercial context of the publisher.
• Concerns a clinical patient population and a diagnosed injury.

Prof. Michael Hamblin

Photobiomodulation for Hair Regrowth

History, mechanisms and applications for alopecia

• Opens with the history and proposed mechanisms of photobiomodulation.
• Then covers research applying it to hair growth and to alopecia.
• Alopecia is a diagnosed medical condition; this is clinical research, not a wellness application.

Dr. Joseph Mercola & Prof. Michael Hamblin

Healing the Body with Photobiomodulation Therapy

Interview highlights · full conversation runs 54 minutes

• Wide-ranging conversation between Mercola and Hamblin on photobiomodulation.
• Published as a highlights reel; the complete interview is longer.
• An interview format rather than a peer-reviewed or conference source — weigh it accordingly.

Andrew Huberman

On Prof. Glen Jeffery’s Red Light and Vision Research

Huberman Lab · clip from an eye-health episode

• Short clip summarizing Jeffery’s laboratory findings on red light and visual function.
• Covers the reported improvement in visual measures following brief 670nm exposure.
• A summary of another researcher’s work rather than original findings.