Earth Day
For a special Earth Day record, Zaid Dahhaj - renowned circadian biology educator - unpacks foundational principles of circadian biology in accessible terms, sharing not only the science behind the body's "orchestra of clocks" but also practical advice for realigning daily life with natural rhythms. The host emphasizes the power of simple shifts—like witnessing the sunrise and embracing nighttime darkness—for reclaiming physical, mental, and even spiritual health. By grounding his mission in both historical context and actionable steps, Zaid Dahhaj invites listeners to reconsider their daily environments and routines, advocating for a return to ancient ways of being as both a remedy and a preservation of humanity itself. This episode serves as both an educational tool and a call to remember and restore the practices that anchor human vitality.
You can connect with Zaid on
IG https://www.instagram.com/zaidkdahhaj/ or
Substack https://substack.com/@UC_AmA-4EJJ8P_G9i36ecomQ
and find his Circadian course here https://the8020course.com
ZAID DAHHAJ'S BACKGROUND
* Began as a competitive athlete with a passion for soccer, inspired by his father 04:00.
* Personal tragedy (father's heart attacks) led him to question mainstream approaches and explore root causes of health and disease, eventually finding circadian biology 05:04.
WHAT IS CIRCADIAN BIOLOGY?
* The study of time within biological systems—the body as an orchestra of internal clocks, each cell having its own 07:02.
* Light is the most powerful "zeitgeber" (external time-giver), alongside meal timing, temperature, exercise, and social interactions 08:12.
FOUNDATIONAL CIRCADIAN PRACTICES
* Morning: Wake up and go outside at daybreak; expose skin and eyes to natural light for an hour or more to set internal clocks 08:56.
* Night: After sunset, switch to darkness or red/amber light; minimize artificial blue/green light to protect melatonin production 11:22.
* Use of screen filters and blue-blocking glasses at night; aim for dark orange or red lenses for best effect 12:19.
MEAL TIMING & HEALTH
* Eating after nightfall disrupts alignment between organ/body clocks and master circadian clock, leading to issues like acid reflux and reduced metabolic health 13:27.
* Best to have main meals during daylight; small snacks at night (like yogurt and berries) can be okay in moderation 14:29.
SUNLIGHT & HORMONES
* Not just sunrise, but UVA rise (about an hour after sunrise) triggers neurotransmitter and hormone production fundamental for mental and physical health 15:33.
PROGRESSIVE OVERLOAD FOR SUNLIGHT EXPOSURE
* Treat sun exposure like exercise—gradual build-up is key. Start with sunrise and red light, then gently introduce UVA/UVB as the day progresses 18:14.
* The full protocol is detailed on Zaid Dahaj's Substack ("Sunbathing for Dummies" article) and in his online course 19:17.
CIRCADIAN HEALTH AS FOUNDATIONAL
* Light, especially sunlight, underpins nearly every facet of health—sleep, hormone balance, metabolic function, and even disease prevention 21:18.
* Zaid Dahaj: "There’s no supplement more powerful than watching sunrise" 20:35.
HISTORICAL NOTE
* Loss of light-based health wisdom traces back to early 1900s centralization of medicine (Rockefeller influence, Flexner Report), pushing out circadian and heliotherapy approaches 26:02.
* Noted that diseases are more prevalent further from the equator, where people receive less sunlight 45:38.
RECLAIMING HUMANITY & HOPE
* Returning to natural cycles—sunrise viewing, grounding, evening fires—are simple, powerful ways to restore health and humanity 36:22.
* Change begins immediately after adopting these practices: "You can go from disconnected to getting connected very, very quickly" 37:03.
PRACTICAL TAKEAWAYS
* Most Leverage: Watch sunrise daily & eliminate blue/white light exposure after sunset (“dark mode”) 32:33.
* Foundational Principle: No pill, supplement, or quick fix replaces circadian alignment.
* Begin Today: Small shifts—early light, mindful meal timing, and nighttime darkness—can transform physical and mental health.