Your 24-Hour Clock
The master clock in your brain
The suprachiasmatic nucleus (SCN) is a tiny cluster of ~20,000 neurons that orchestrates every system in your body on a 24-hour cycle.
Light is the #1 signal
Special photoreceptors in your eyes (melanopsin cells) detect blue light and send timing signals directly to the SCN. No other signal is as powerful.
Explore the daily rhythm
Tap each time of day to discover what your body is doing.
This step is interactive — open the Thier app to try it.
True or False
Your circadian rhythm runs on exactly 24 hours.
This step is interactive — open the Thier app to try it.
Every organ has a clock
Your liver, heart, gut, and muscles all have their own peripheral clocks. When these desynchronize from the master clock, disease risk rises dramatically.
Key Takeaway
Your circadian rhythm controls hormones, metabolism, and immunity. Consistent light/dark patterns are the most important thing you can do for it.