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 infrared) can enter the body and brain to enhance mitochondrial function and thereby improve metabolism, eyesight, blood glucose regulation, mood, hormones and more. We also discuss how short-wavelength light from LED bulbs can impair mitochondrial health and why balanced, full-spectrum light is essential for health. Dr. Jeffery shares simple yet powerful ways to use natural and artificial light sources to enhance your metabolic function, eyesight and longevity.
Show notes: https://go.hubermanlab.com/gwX6N6d
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*Dr. Glen Jeffery*
Academic profile: https://profiles.ucl.ac.uk/7465
University College London Research Domains: https://www.ucl.ac.uk/research/domains/food-metabolism-society/experts/glen-jeffery
Google Scholar: https://scholar.google.com/citations?user=UYlObKkAAAAJ&hl=en
LinkedIn: https://www.linkedin.com/in/glen-jeffery-441a2b1b
*Timestamps*
00:00:00 Glen Jeffery
00:03:12 Light, Ultraviolet (UV), Visible & Infrared (IR) Light
00:06:25 Light’s Impact on the Body & Light, Sunburn, Cataracts
00:09:55 UV Light, All-Cause Mortality, Skin Cancer
00:14:55 Sponsors: Wealthfront & Joovv
00:17:58 Light Impacts Mitochondria Function & Structure, Long-Wavelength Light (Red/IR), Nano Water
00:25:00 Long-Wavelength Light Passes Through Clothing & Body; Tissue Scattering
00:30:08 Long-Wavelength Light & Blood Glucose; Mitochondria
00:36:19 Red Light, Parkinson’s Disease, Cell Death; Eye Rods & Aging; Mitochondria Community
00:42:46 Red/IR Light, Skull & Brain; Safe Non-Ionizing Radiation
00:48:22 Sponsors: AG1 & Rorra
00:51:04 Offsetting Retinal Aging, Improve Vision & Long-Wavelength Light
00:59:28 Tool: Long-Wavelength Light & Preserve Retinal Mitochondria; Sunlight
01:03:50 Mitochondrial Theory of Aging, Circadian Rhythm & Mitochondria
01:07:57 Tool: Improve Vision with Long-Wavelength Light
01:10:44 Macular Degeneration, Rescuing Vision, Early Intervention
01:13:59 Light Effects at Local vs Distant Tissues, Immune System, Body Communication
01:19:09 Sponsor: Function
01:20:56 Short-Wavelength Light, LED Light, Mitochondria & Serious Health Detriments
01:28:39 Lifespan, LED Lights; Sunlight & Balanced Wavelengths; "Sunlike" Marketing
01:34:45 Fires, Incandescent Lights vs LED Lights, Lasers; Long-Wavelength Devices
01:39:07 Incandescent & Halogen Bulbs, Mitochondria & Built Environments
01:45:19 Windows, Light & Office Work; Screens, Kids & Myopia; Tools: Plants; Lighting
01:55:56 Bring the Outdoors Indoors
02:00:35 Tool: Candlelight; Dim Halogen Lamps
02:05:06 Mitochondrial Diseases, Children & Long-Wavelength Light; Light Bulbs
02:11:53 Zero-Cost Support, YouTube, Spotify & Apple Follow, Reviews & Feedback, Sponsors, Protocols Book, Social Media, Neural Network Newsletter
_*This experience may not be representative of other Wealthfront clients, and there is no guarantee of future performance or success. Experiences will vary. Andrew Huberman receives cash compensation from Wealthfront Brokerage for paid testimonials in his podcast, creating a conflict of interest. The Cash Account, which is not a deposit account, is offered by Wealthfront Brokerage LLC, member FINRA/SIPC. Wealthfront Brokerage is not a bank. The base APY is 3.50% on cash deposits as of November 07, 2025, is representative, subject to change, and requires no minimum. If eligible for the overall boosted rate of 4.15% offered in connection with this promo, your boosted rate is also subject to change if the base rate decreases during the 3 month promo period. Funds in the Cash Account are swept to program banks, where it earns the variable APY. Same-day withdrawal or instant payment transfers may be limited by destination institutions, daily transaction caps, and by participating entities such as Wells Fargo, the RTP® Network, and FedNow® Service. New Cash Account deposits are subject to a 2-4 day holding period before becoming available for transfer. Investment advisory services are provided by Wealthfront Advisers LLC, an SEC-registered investment adviser. Securities investments: not bank deposits, bank-guaranteed or FDIC-insured, and may lose value._
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