Section
Light & Recovery
Wavelengths, heat load, and dose — recovery tools without the hype layer.
Light and heat are controllable inputs with real physiology — and real marketing noise. This section separates ocular daylight for circadian entrainment from UV for vitamin D and skin risk, grades red/near-infrared photobiomodulation by indication (hair and skin stronger than metabolic disease claims), and reports Finnish dry sauna observational outcomes without laundering infrared consumer devices into the same evidence base. Pregnancy, unstable cardiovascular disease, and alcohol-plus-heat are hard safety gates.
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Light & Recovery
Sauna and Blood Pressure: Evidence for Hypertension Support
Heat stress is not a drug—but Finnish-style sauna has real BP and CV observational signals.
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Light & Recovery
Red Light for Skin Photoaging: Evidence, Dosing, Safety Limits
Wrinkle and collagen trials are among PBM’s stronger cosmetic datasets—with clear non-miracle boundaries.
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Light & Recovery
Red Light Therapy for Hair Growth: LLLT Evidence and Protocols
FDA-cleared home lasers have sham-controlled density gains. Not a transplant—often a multi-month adjunct.
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Light & Recovery
Vitamin D: Sunlight Synthesis vs Supplements—What Authorities Prefer
UVB makes cutaneous D₃—but AAD and Endocrine Society 2024 favor oral repletion over intentional UV for endocrine goals.
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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.
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Light & Recovery
Sauna Benefits: What the Evidence Actually Shows
Finnish dry-sauna cohort data on heart, stroke, and blood pressure—separated from infrared marketing, detox myths, and pregnancy risks.
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Light & Recovery
Red Light Therapy: A Complete Evidence Guide to PBM
Wavelengths, biphasic dosing, hair and skin pillars, pain nulls, and why metabolic claims stay experimental.
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Light & Recovery
Photobiomodulation Dosing: Irradiance, Fluence, and Biphasic Response
Fluence is not irradiance. J/cm² = mW/cm² × seconds / 1000. Too little does nothing; too much can inhibit—Arndt–Schulz in practice.
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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.
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Light & Recovery
Finnish Sauna and Mortality: The KIHD Laukkanen JAMA Study Explained
2,315 men, 20.7-year follow-up: 4–7 sauna sessions/week vs 1×/week associated with HR 0.37 for sudden cardiac death—observational, not causal proof.
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