Sleep isn't passive rest. Every night your body runs a full maintenance cycle: cortisol clears, your brain flushes metabolic waste, and your cells repair the damage accumulated during the day.
That cycle takes real biological energy to complete. And it depends on your mitochondria, the cellular power plants, being equipped to do the work.
When mitochondrial function is compromised, whether from chronic stress, nutrient gaps, or the accumulated wear of modern life, it affects every system in the body, including whether that overnight maintenance cycle does its job.
"That was the piece I was missing," Andrew said. "I wasn't sleeping badly. My cells weren't equipped to do what sleep is supposed to let them do."
It doesn't stop at sleep, either. The same cellular systems that determine whether sleep restores you also govern how consistent your energy is, how you respond to stress, and how fast you recover from a hard week. When those systems are working, the body is resilient. When they're not, the foundation crumbles and everything downstream goes with it.