#267: Kevin and Sharif explore how depression connects to “bad tired,” the draining fatigue that comes from poor sleep, chronic stress, or unfinished effort. At the center is one molecule — adenosine — which can make us feel either “good tired” (satisfied, fulfilled) or “bad tired” (blue, demotivated). Kevin unpacks how adenosine builds up in the brain, how sleep and astrocytes clear it, and how simple practices — from morning light, hydration, and exercise to breathing, cold exposure, and creatine — can flip tiredness from despair into satisfaction.

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