Light as Medicine, Darkness as Poison: Fix Your Sleep, Energy, and Skin with Light

Morning light is medicine; evening light is poison. This book exposes the biological mechanism behind modern exhaustion: the suprachiasmatic nucleus, a tiny brain region that synchronizes every organ to light signals, is being sabotaged by screens and fluorescent tubes. Blue light after sunset suppresses melatonin production by up to eighty-five percent. Morning sunlight triggers the cortisol awakening response and serotonin synthesis. From Seasonal Affective Disorder treatment protocols to the Attention Restoration Theory of natural environments, this guide maps the science of circadian optimization.

You'll learn:

- Why two hours of evening screen time delays melatonin release by three hours

- How five lux of bedroom light disrupts glucose metabolism overnight

- The fifteen-minute morning exposure that resets your entire hormonal cascade