The Complete Framework for Circadian Light, Melatonin, and Sun Exposure
13 sections · Updated July 2026 · 9 sources cited
All sections
Why this guide exists — and how to use it
The practical version, before the mechanisms
The photoreceptor that isn't for seeing
The dose-response evidence behind the single highest-leverage habit in this guide
Why ordinary room lighting, not just screens, is the bigger issue
What the evidence actually shows — and it's less than the marketing suggests
One of the strongest treatment-trial evidence bases in this guide
Using light deliberately to move your clock on purpose
Balancing circadian benefit against genuine skin cancer risk
Sun vs supplementation, and why reliability matters
Turning the guide into a practical, permanent setup
Key sources behind this guide — linked directly to the source where available
Concise definitions for terms used throughout this guide