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The Circadian Classroom

Zaid K. Dahhaj
Hundreds of paid subscribers

Exploring the circadian foundation of human health.

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Substack
PricingOnly paid issuesPublishesDaily
Issues315Founded3 years agoLast Issue16 days ago
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Latest Issues

Your Ophthalmologist Blames the Sun For Cataracts & Eye Problems, But Not Your Nighttime Commute

The lens was built for sunlight. It was never built for LED headlights at 11 PM through an 8mm pupil with bottomed-out glutathione.

Nobody in ophthalmology wants to talk about this from the circadian perspective.

16 days ago
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You Don't Have a Sun Allergy, You Have a Circadian Clock Problem

Why "photosensitivity" is almost never an allergy, and almost always a failure of circadian priming, immune tolerization, and peripheral clock integrity.

Every spring, millions of people step outside for the first time in months and their...

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The Circadian Case Against Retinol

The billion dollar anti-aging industry sells women a molecule that overrides the very repair system it claims to support, and the literature proves it.

The global retinol beauty market is approaching $1.4 billion in annual revenue.

21 days ago
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The Sun Did Not Need My Permission

An account by Dr. Auguste Rollier, as he might have written it for a modern audience

I did not set out to become a heretic. I set out to become a surgeon. The difference between those two things turned out to be one patient.

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Same Calories, Different Ovaries: How Meal Timing Reversed PCOS in 90 Days

Polycystic ovary syndrome is the most common endocrine disorder in reproductive age women on the planet.

Polycystic ovary syndrome is the most common endocrine disorder in reproductive age women on the planet. It affects somewhere between...

a month ago
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  • Zaid K. Dahhaj

    Circadian Heliotherapy. Restoring human health and sovereignty through circadian alignment. Building The 2AM Podcast.

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