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Olivia Walch

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Chronomedicine, Circadian science, Sleeping troubles

Melatonin Is a Stage Manager, Not the Star of Sleep

May 21, 2025 Olivia Walch

Let’s talk melatonin. Or, as I like to call it (to the confusion of my friends and loved ones): negative light. What I mean is this: This doesn’t mean darkness = melatonin. You need darkness at the time your body wants to make melatonin. For most of us, this happens at night. You can expect […]

Arcashift App, Circadian science, Lighting

Circadian Rhythms Are Like Walking

April 9, 2025 Olivia Walch

Have you ever timed up your steps with a friend’s as you walk on the sidewalk? Or synced up your steps to match a pattern of tiles on the ground?  Our bodies know what it’s like to find a groove, a pattern, a rhythm. It turns out, that’s not just true for your feet—it’s also […]

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  • Real Sleep Studies, Real Sleep Loss, Really Bad Ideas
  • Melatonin Is a Stage Manager, Not the Star of Sleep
  • Social Jet Lag: Why Your Weekend Sleep Habit Isn’t Helping

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