Working Outdoors Under Sunlight Extends Lifespan Primarily by Improving Sleep Quality

What was said

"If you work outdoors, you're healthier, you live longer, primarily because you sleep better. Sunlight, blue light, suppresses melatonin. So the graph of melatonin production will be a flat line, really low. But then toward the evening, the sun goes down and that light stops the suppression of melatonin and allows melatonin to be produced at a rapid rate."

King revealed research showing that outdoor workers live longer primarily due to superior sleep quality, not just physical activity or fresh air. He explained that natural sunlight exposure suppresses melatonin during the day, then allows rapid production at night, creating a strong sleep-wake cycle. Indoor workers under artificial light have minimal melatonin variation between day and night, severely degrading sleep quality.