Regenerative Health with Max Gulhane, MD 99. How Natural Light Improves Eye Health, Blood Sugar and Lowers All Cause Mortality | Jonathan Jarecki
We discuss three pivotal studies showing how natural light wavelengths positively influence health from all-cause mortality to visual perfomance to blood glucose control in Type II diabetics.
Jonathan Jarecki is a biomedical science sophomore with an interest in light and health, and host of Whole Health Podcast.
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TIMESTAMPS
2:41 Why UV Exposure Might Extend Life
7:28 Building The Sunbeam Score
15:11 Confounders, Vitamin D, And Validity
18:16 Mortality Findings And Dose Response
22:11 Melanoma, Incidence, And Trade-Offs
32:20 How Many Deaths Does Sunlight Prevent?
41:05 Policy, Vitamin D Pills, And Mechanisms
45:59 LEDs Versus Incandescent: The Vision Study
54:10 Infrared, Mitochondria, And Eye Function
1:05:40 Reimagining Indoor Light For Health
1:07:25 Daylight And Glucose Control In Diabetes
1:17:05 Circadian Gene Effects And Brightness
1:23:05 What Better Studies Should Test Next
Resources & Links:
Richard Weller et al: Risk–benefit balance of habitual ultraviolet exposure for cardiovascular, cancer, and skin cancer mortality: UK Biobank cohort study
- https://www.medrxiv.org/content/10.64898/2026.01.08.26343592v1
Glen Jeffrey et al: LED lighting (350-650nm) undermines human visual performance unless supplemented by wider spectra (400-1500nm+) like daylight
- https://www.nature.com/articles/s41598-026-35389-6
Natural daylight during office hours improves glucose control and whole-body substrate metabolism
- https://pubmed.ncbi.nlm.nih.gov/41418772/
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