Common symptoms
- •Wired-but-tired — exhausted but can't sleep
- •Wake at 2–4am and can't fall back asleep
- •Afternoon energy crash, sugar/salt cravings
- •Anxiety, racing thoughts, short fuse
- •Slow recovery from training or illness
- •Light-headed standing up, low blood pressure
- •Cycles becoming shorter or skipping
- •Weight settling around the middle despite the same routine
What drives it
- •Chronic under-recovery (sleep debt, over-training, under-eating)
- •Perimenopause — falling progesterone destabilises the stress axis
- •Subclinical thyroid disease layered on top
- •Long-COVID and post-viral states
- •Caffeine + alcohol pattern that masks the underlying fatigue
Testing approach
A morning blood cortisol (before 9am) is the right starting point — it confirms the adrenal glands can still produce cortisol and rules out Addison's. We then read it against DHEA-S (the longer-term adrenal output), TSH/free T4/free T3 (thyroid usually moves with the adrenals), and sex hormones if you're perimenopausal. Salivary or urinary cortisol curves can layer in later if rhythm is the question.
What to do next
- ✓Anchor a non-negotiable wake time and 10 minutes of morning daylight
- ✓Eat protein within an hour of waking — skip the empty-stomach coffee
- ✓Swap one HIIT session for strength + walking until energy returns
- ✓Re-test cortisol and DHEA-S after 8–12 weeks of recovery work
- ✓If perimenopausal, address the hormone layer too — adrenal work alone won't hold
Frequently asked
Not in conventional endocrinology — the adrenal glands rarely 'burn out'. But HPA-axis dysregulation is measurable, and the symptoms women describe as adrenal fatigue are real and treatable.
Blood cortisol drawn before 9am is the cleanest first test — it answers 'is your adrenal output broken?'. Saliva and urine 4-point curves add rhythm detail later if needed.
Lab reference ranges are wide and built to catch Addison's and Cushing's — not the in-between pattern. We read cortisol against DHEA-S, thyroid and sex hormones for the full picture.
Yes — falling progesterone is one of the brain's main stress brakes. Many women first present with 'adrenal' symptoms that are actually perimenopause.
Ashwagandha, rhodiola and similar can take the edge off, but they don't replace sleep, fuelling and load management. Use them as scaffolding, not a fix.
Most women feel meaningfully different in 8–12 weeks of consistent recovery work. Re-testing at that point shows whether cortisol and DHEA-S are tracking back.
Coffee on an empty stomach in the first hour after waking spikes cortisol when it's already peaking. Move coffee to after breakfast for a month and watch what happens.
References
- Endocrine Society — Adrenal insufficiency guidelines— HPA-axis testing, cortisol norms and adrenal disorders
- NICE — Adrenal disorders— Assessment of abnormal cortisol and DHEA-S patterns
- Jean Hailes — Stress and hormonal health— Chronic stress and the female HPA axis
- Endocrine Society — DHEA and adrenal health— DHEA-S as an adrenal reserve marker
References are provided for educational context only. Her Form is not affiliated with these organisations. Always interpret results with a qualified healthcare professional.