Commune with Jeff Krasno How Light Heals: The Forgotten Medicine of the Sun
Nov 11, 2025
Discover the powerful connection between light and health as Jeff explores how natural light influences our circadian rhythms and hormonal balance. From the crucial role of morning blue light in setting our internal clock to the dangers of modern screens disrupting sleep, the discussion is eye-opening. Learn practical protocols for improving sleep quality, the benefits of sunlight for vitamin D synthesis, and how nature boosts mitochondrial health. Ultimately, it’s a reminder of our ancestral ties to the sun and the need to realign with its rhythms.
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Fege: Ancestral Light Example
- Jeff imagines an ancestor named FEDGE whose sleep and light exposure mirrored ancestral environments.
- He uses this story to highlight how modern lifestyles clash with evolved light-based biology.
Morning Blue Light Sets Your Clock
- Morning blue light activates retinal ganglion cells that set the suprachiasmatic nucleus and circadian clock.
- That timing causes melatonin to rise ~12–14 hours later, aligning sleep with night.
Get 20 Minutes Of Morning Light
- Within an hour of waking, get ~20 minutes of outdoor morning light without sunglasses to set circadian timing.
- Use a 10,000 lux light box 12 inches away for 20 minutes if natural light isn't available.
