10/12/2025
If your mornings feel like you’re running on fumes, it’s not “just stress” or needing more sleep.
It’s likely a blunted cortisol awakening response (CAR) — the moment your hormone–mitochondria axis is supposed to flip the “on” switch… but doesn’t.🥴
When CAR is intact, cortisol rises within 30–45 minutes of waking, signaling👇🏽
🧠 “Time to wake the mitochondria.”
🦋 “Convert T4 to T3 — throttle up metabolism.”
🍽 “Stabilize glucose — keep energy steady.”
When CAR is blunted, that signal fizzles. 😶🌫️Mitochondria stay in idle. Glucose wobbles. T3 conversion lags.
By 3PM, you’re crashing.
By 10PM, your brain finally “wakes up” — wired when you should be winding down.
This isn’t random fatigue. It’s a hormone–energy cascade that sets the tone for your entire day.
👉 Which cascade sounds more like your mornings — ignition or flatline?