Sunlight & Circadian
Timing matters: light is your strongest daily signal to the body clock.
Timing matters: light is your strongest daily signal to the body clock.
What this pillar is
Build a stable rhythm with morning light, daytime outdoor time, and evening dimness — then protect it with a consistent wake time.
¶ Start (action-first)
- Run the Sunlight & Circadian Starter Kit for 7 days.
- If sleep is the bottleneck → use the Sleep Starter Kit.
- If you travel a lot → start with Weekend Reset and keep wake time stable.
¶ Deep dive
Do not burn
The goal is regular light exposure without erythema (burn). For risk‑stratified guidance and mechanisms (Vitamin D, NO, circadian), see the deep dive.[1]
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