Light
The original medicine. For millions of years, humans lived by natural light cycles. Sunlight drives vitamin D production, sets circadian rhythm, affects mood, and may even influence mitochondrial function. Modern indoor living with artificial light disrupts these ancient signals. Light matters more than we realize.
Sunlight Benefits
Vitamin D Production
UVB converts cholesterol to vitamin D. 10-30 min midday sun. Skin exposure needed.
Circadian Rhythm
Morning light sets the body clock. Signals daytime to brain. Improves sleep timing.
Mood & Depression
Light affects serotonin. SAD from low light. Bright light therapy works.
Nitric Oxide Release
Sun on skin releases NO. Lowers blood pressure. Cardiovascular benefits.
Eye Health
Outdoor time prevents myopia in children. Natural light frequency balance.
Immune Function
Beyond vitamin D effects. Direct immune modulation from light exposure.
Artificial Light Problems
Blue Light at Night
Screens, LEDs suppress melatonin. Delays sleep. Disrupts circadian rhythm.
Insufficient Daytime Light
Indoor lighting is dim compared to sun. Clock never fully sets.
Missing Frequencies
LEDs lack infrared and red. Sunlight has full spectrum. Missing signals.
Constant Brightness
No natural dimming. Bright until bedtime. Body confused about timing.
Optimizing Light Exposure
Morning Sunlight
10-30 minutes within first hour of waking. Outside, not through window.
Blue Blockers at Night
Orange or red glasses after sunset. Block screen blue light.
Dim Evening Lights
Low, warm lighting in evening. Candles, salt lamps. Mimic sunset.
Red Light Therapy
600-900nm wavelengths. Mitochondrial support. Skin, pain, healing benefits.
Outdoor Time
More time outside regardless of weather. Natural light is medicine.
Light Alarm Clock
Sunrise simulator. Gradual light to wake. Better than jarring alarm.