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But why does sleep regularity have such a significant effect?
It’s likely because of how changes in our sleep patterns tinker with our circadian clock.
We have circadian clocks in every cell in our body, which regulate every biological function from metabolic health to mental health, but they evolved under very stable environmental conditions, such as where the sun rose and set at the same times each day.
When our sleep patterns are consistent, our exposure to light tends to be consistent.
