Evidence-dense health optimization

Health Canon

Topic

Circadian

Circadian is a recurring research topic on Health Canon. This hub collects related explainers and protocols, newest first, each with evidence grades and practical decision frameworks.

  1. Light & Recovery

    The Sunlight and Circadian-Rhythm Routine (2026)

    Morning outdoor light, daytime activity light, dim evenings, dark sleep—UV safety without cave dwelling.

    JULIAN HART 14 MIN READ

  2. Light & Recovery

    Sunlight and Vitamin D: A Decision Guide (2026)

    Latitude, season, skin, and labs first—then sun, food, and supplements without tanning extremism.

    JULIAN HART 14 MIN READ

  3. Light & Recovery

    Indoor Lifestyle Costs: Vitamin D Gaps Plus Circadian Light Deficiency

    Modern indoors deliver a double hit: weak UVB for vitamin D and weak daytime melanopic light plus evening screen excess. Mitigate with morning outdoor light, workplace daylight, oral D when indicated—not tanning beds.

    JULIAN HART 4 MIN READ

  4. Light & Recovery

    Sunlight, Mood, and Seasonal Affect: Serotonin Stories Graded Against Light Therapy Evidence

    Daylight and bright light therapy help seasonal mood patterns for many people. “Serotonin sun” slogans are simplified. Use dawn outdoor light and clinical LT when indicated—not tanning beds.

    SOFIA RAJAN 4 MIN READ

  5. Light & Recovery

    Evidence-Based Circadian Habits (2026)

    Circadian habits with evidence: morning outdoor light, dim evenings, stable sleep timing, caffeine cutoffs, modest meal regularity, and shift-work harm reduction.

    JULIAN HART 14 MIN READ

  6. Expert Dossiers

    Jack Kruse Central Dogma: Light–Water–Magnetism Hierarchy Graded

    The stack is a totalizing hierarchy: light and nnEMF first, water as medium, food second-order. Extract kernels; reject ranking absolutism as clinical policy.

    JULIAN HART 4 MIN READ

  7. Light & Recovery

    Light-Hygiene Habits for Better Sleep (2026)

    Circadian light habits for sleep: morning outdoor light, dim evenings, bedroom dark, consistent schedule—screens and gadgets ranked by real effect size.

    JULIAN HART 13 MIN READ

  8. Metabolic Health

    Sleep, Circadian Rhythm, and Insulin Resistance

    Short sleep and night light are metabolic exposures—not soft lifestyle footnotes.

    MARCUS CHEN 4 MIN READ

  9. Light & Recovery

    Circadian Daylight and Melanopic EDI: Why Eyes Beat UV for Sleep Timing

    ≥250 melanopic lux days, ≤10 evenings, dark nights—visible light, not tanning.

    JULIAN HART 4 MIN READ

  10. Expert Dossiers

    Jack Kruse: The Habits Worth Keeping (2026)

    Kernel-only ranking: circadian light, night hygiene, moderate cold, seafood omega-3s, meal structure, and an explicit quarantine list—not an endorsement.

    JULIAN HART 14 MIN READ

  11. Light & Recovery

    Sunlight Benefits and Risks: A Photobiology Balance Guide

    Vitamin D, circadian light, UVA vascular claims, and cancer risk—pathway by pathway, without tan-for-health myths.

    JULIAN HART 8 MIN READ

  12. Expert Dossiers

    Jack Kruse Evidence Dossier: Graded Claims on Light, Cold, Leptin & EMF

    Neither hagiography nor hit piece — grade Jack Kruse claims A–D. Keep circadian light hygiene and fish-fat kernels; quarantine quantum lifestyle monocauses, CT cure lists, structured-water medicine, and nnEMF primacy.

    JULIAN HART 8 MIN READ

  13. Light & Recovery

    Jack Kruse Circadian Light Claims: Melanopsin Kernel vs Obesity Slogan

    Morning daylight entrains the clock. That does not make light the primary cause of the obesity epidemic.

    JULIAN HART 4 MIN READ

Frequently asked

About Circadian

What is Circadian?
Circadian is a topic our editors cover across environmental health, metabolism, fitness, and recovery. This hub aggregates related guidance with citations.
How often is the Circadian hub updated?
This hub updates when new articles are tagged Circadian, so the latest coverage appears first.
Is Circadian coverage medical advice?
No. Content is research synthesis for education. Personal medical decisions require a qualified clinician.