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Zaid K. Dahhaj

Circadian educator & coach restoring human health through circadian alignment

The 80/20 Circadian Course

The 80/20 Circadian Course

$249

Your sleep, energy, and clarity run on a few circadian inputs most people get wrong. Light. Circadian timing. The order you fix them in. This course shows you which inputs matter and how to align them.

This course comes from the heart. My father died of heart disease at 51 in 2015. I built this to teach the habits that protect the body, why they work, and how to apply them in the order that matters most.

Your cells read light directly. Mitochondria, melatonin, and the Vitamin D your skin makes from sunlight all take their cues from the light hitting you across the day. Get that input right and sleep and energy follow. Get it wrong and no supplement fixes it.

100+ lessons. 5 modules. Regularly updated with new research. Lifetime access.


Start here: Circadian Audit Checklist

Before you change anything, map where you stand. Your current relationship to light, sleep, and the other fundamentals. See what's off. Know what to fix first.

Module 1: The Philosophical Principles of Circadian Biology

The foundation that makes every other health decision easier. Build your philosophy from the ground up and the rest flows. Once you see this, you'll understand why some advice worked and other advice never could.

Module 2: Circadian Biology, Light Environment, and Sleep

The largest and most valuable module. Covers:

  • Quantum biology and how your cells respond to light

  • The full solar spectrum and how to use it

  • Circadian hormones, mitochondria, melanin, and melatonin

  • Endogenous Vitamin D vs oral supplementation

  • Circadian eyesight regeneration

  • The real science of skin, sunlight, and skin cancer

  • The lost history of heliotherapy (sun therapy)

  • Light environment fundamentals from daybreak to night

  • Circadian friendly lighting recommendations

  • A complete sleep system organized from morning to bedtime

  • Wake-up timing, meal timing, sleep temperature, and schedule consistency

Module 3: Grounding and Electromagnetism

How your body conducts electricity through the living matrix. The research on grounding, practical protocols, cold therapy and UV exposure together, and how to manage your electromagnetic environment without losing your mind or becoming Chicken Little.

Module 4: Water and Hydration

Structured water, when and how much to drink, water quality, and the scientists whose work shapes this field. Simple hydration rules that align with your circadian rhythm. It sounds stupidly simple, but most people ignore the fundamentals precisely because they are stupidly simple and easy to ignore.

Module 5: Ongoing Bonus Content

How to read and trust scientific research. Plus ongoing additions as new circadian science emerges.

Also included:

  • Circadian Audit Checklist

  • All future course updates

  • Hosted on Notion. Works on any device, at your own pace.

30 day guarantee. Apply the framework. If you don't feel a real difference in your sleep, cognition, or energy within 30 days, email me for a full refund.


See What Course Students Have To Say About It

Start Your Circadian Reset

Total :US$249
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