Burnout isn't only psychological — it has a hormone signature. Cortisol is the headline driver, but it doesn't show up the way most people expect.
The wired-but-tired pattern
Cortisol should peak ~30 minutes after waking and gradually fall through the day, hitting a low overnight. In chronic stress, the pattern inverts: blunted morning, sustained mid-day, and a late-evening rise that wrecks sleep onset and triggers 2–4am waking.
What we test
A single morning cortisol gives a snapshot. The full picture also includes:
- •AM cortisol (between 7–9am)
- •DHEA-S (adrenal reserve)
- •TSH + free T3 (thyroid mimics burnout)
- •Ferritin (low iron looks like exhaustion)
- •Vitamin D, B12
- •Fasting insulin + HbA1c (metabolic context)
What actually moves the needle
The supplements industry sells adrenal support; the bigger lever is upstream — sleep regularity, morning light, training intensity calibration, caffeine timing, and reducing the chronic-low-grade stressors. Bloodwork tells you whether deficiencies are sitting underneath.