Dr. Alan Bradford (@abnd)

Most of us worry about what's in our food and water. But what about the light overhead after sunset? Your phone screen is about 100 times brighter than the full moon — and that light tells your body's master clock to stop making melatonin. The WHO's cancer agency classifies night shift work and circadian disruption as probably carcinogenic. This week's episode breaks down the melatonin–cortisol relationship, what melatonin does inside your cells, why modern LEDs miss a key band of light, and the changes that matter tonight: dim the lights after sunset, no screens one to two hours before bed, blue blockers, and a real sleep mask. Part 2 next week. https://youtu.be/LLjtKx-iMr8