This Healthy Buildings - Videocast is based on excerpts from the book: Healthy Buildings -…

Dr. Glen Jeffery’s “Eye-Opening” Work >>>
Professor Glen Jeffery is a leading Neuroscientist at the UCL Institute of Ophthalmology (London). His recent work has shifted from traditional vision science to a broader exploration of how light acts as a metabolic agent by interacting with mitochondria.
- Core Research: The “Red Light” Effect
Jeffery’s research focuses on how long-wavelength light (specifically 670 nm red and near-infrared) affects human health:
Blood Sugar Control: He discovered that 15 minutes of red light exposure on the back can reduce post-meal blood glucose spikes by nearly 28%.
Vision Restoration: His studies show that a brief “dose” of deep red light in the morning can “recharge” aging retinal cells, improving color contrast and low-light vision for those over 40.
Systemic Healing: His 2025–2026 research suggests these wavelengths penetrate the body to reduce systemic inflammation and support mitochondrial activity throughout the organs.
- The “LED Warning”
A major theme in his recent work is the toxicity of modern LED lighting. He argues that because LEDs are “red-starved” (heavy on blue light but lacking the restorative red/infrared found in sunlight), they may be contributing to metabolic dysfunction and accelerated aging. - Professional Contact
Email: g.jeffery@ucl.ac.uk
Location: UCL Institute of Ophthalmology, London, UK.


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