A forty-seven-year-old patient sat across from me last fall and described what she called "wired and tired." She fell asleep on the couch by 8:30 every night. By 11 PM she was wide awake with her heart racing. She woke at 3:30 AM almost every morning, lay there for two hours, then dragged through the day on caffeine. She had gained eighteen pounds in the abdomen specifically. Her hair was thinning. Her last primary care visit ended with "your labs look normal, try to manage your stress." She arrived at my office wanting to know whether she was losing her mind.
She was not. She was describing a textbook HPA axis dysregulation pattern — the system that controls your stress response, your cortisol rhythm, and the daily timing of your wake and sleep cycles. The patient had been told her labs were normal because the standard panel her primary care ran did not measure cortisol at all, much less measure it across the day in the pattern that would have shown the problem. This is one of the most common mid-life presentations I see, and one of the most consistently missed.
What the HPA axis actually is
The hypothalamic-pituitary-adrenal axis is the central hardware of your stress response system. It is a three-station signaling cascade:
The hypothalamus is the upstream sensor in your brain. It integrates signals from your environment, your circadian clock, your nervous system, and your circulating hormones, and it secretes a hormone called CRH (corticotropin-releasing hormone) into the small portal vessels that connect it to the pituitary.
The pituitary is the relay. CRH from the hypothalamus stimulates pituitary release of ACTH (adrenocorticotropic hormone) into the systemic circulation.
The adrenal cortex is the effector. ACTH stimulates the adrenal glands to produce cortisol, the body's primary glucocorticoid stress hormone, which then circulates to every tissue in the body.
Cortisol then loops back to the hypothalamus and pituitary in a negative feedback signal — when cortisol is high, CRH and ACTH go down. This is the architecture that produces the diurnal cortisol rhythm: a sharp peak within thirty minutes of waking (the cortisol awakening response, or CAR), a gradual decline through the day, and a low point in the evening that allows melatonin to rise and sleep to begin.
When this rhythm is intact, you wake up alert, focus through the morning, sustain energy through the afternoon, wind down in the evening, and sleep through the night. When it is disrupted, the rhythm flattens, inverts, or develops secondary peaks — and the symptom pattern that produces is exactly what my patients describe.
What HPA axis dysregulation actually looks like clinically
The textbook teaches "adrenal fatigue" as if it were a diagnosis. It is not a recognized clinical entity, and the framing has caused real harm — patients are told their adrenals are "tired" and given supplements that do nothing for the underlying problem. What actually happens in mid-life HPA dysregulation is more specific: the rhythm shifts.
The most common patterns I see on a four-point salivary cortisol curve or a DUTCH test:
- Flattened CAR with elevated evening cortisol. This is the "wired and tired" presentation. Sluggish in the morning, second-wind at night, lying awake at 11 PM, then a 3 AM cortisol surge that wakes the patient and prevents return to sleep.
- Elevated total daily cortisol with preserved rhythm. Chronic stress phenotype. Anxious, irritable, central weight gain, blood pressure creeping up, sleep onset insomnia.
- Suppressed total daily cortisol with flattened rhythm. Long-standing pattern, often after years of the elevated-cortisol phase. Profound fatigue, low blood pressure on standing, poor stress tolerance, exercise intolerance.
- Normal total cortisol with disrupted rhythm. The pattern that gets missed most often by single AM cortisol draws. The total is normal but the timing is wrong.
Each of these has different downstream effects. Each requires a different intervention. None of them are visible on a 7 AM serum cortisol drawn as part of a standard primary care panel.
How HPA dysregulation interacts with sex hormones and thyroid
This is where the conversation gets clinically important, because cortisol does not exist in isolation. It is in constant crosstalk with the sex hormones, thyroid hormones, and insulin signaling.
Pregnenolone competition. Cortisol is synthesized from pregnenolone, the same precursor used for sex hormone production. When cortisol demand is chronically high, pregnenolone is preferentially shunted toward cortisol at the expense of progesterone and DHEA. The clinical effect: declining progesterone independent of menopause stage and declining DHEA.
Thyroid conversion suppression. Elevated cortisol inhibits conversion of T4 to T3 (the active form), and increases conversion of T4 to reverse T3. The TSH can look normal, the free T4 can look normal, but the free T3 is suppressed and reverse T3 is elevated — functional hypothyroidism that a TSH-only screen misses every time.
Insulin signaling. Cortisol antagonizes insulin at the receptor level and stimulates hepatic gluconeogenesis. Chronically elevated cortisol drives insulin resistance, which suppresses SHBG and shifts free testosterone in both directions depending on sex.
This crosstalk is why a patient who comes in for "low energy" rarely has a single-hormone problem. The cortisol pattern, the sex hormones, the thyroid, and the metabolic markers are reading the same dysregulation from different angles.
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How I evaluate the HPA axis in practice
When I evaluate a patient for suspected HPA axis dysregulation, I am not satisfied with a single AM cortisol. The single draw misses too much.
The labs I order, depending on the clinical picture:
- Four-point salivary cortisol (waking, +30 minutes, midday, evening) — captures the diurnal rhythm and the cortisol awakening response in a way a serum draw cannot
- DUTCH (dried urine test for comprehensive hormones) when I want to see cortisol metabolites alongside sex hormone metabolites in the same sample — useful when the picture is mixed
- Serum cortisol and ACTH when I am ruling out a primary adrenal or pituitary process
- Full thyroid panel — TSH, free T4, free T3, reverse T3, TPO and TgAb antibodies — because thyroid is downstream of cortisol and screening with TSH alone is inadequate
- Sex hormones — estradiol, progesterone, total and free testosterone, DHEA-S, SHBG — because cortisol crosstalk with sex hormones is the rule, not the exception
- Metabolic markers — fasting insulin, HbA1c, fasting glucose, comprehensive metabolic panel
- Inflammatory markers when the symptom picture includes pain or fatigue out of proportion — hs-CRP, fibrinogen, sometimes ferritin
What I look for is the pattern, not any single value. Two patients with identical TSH values can have completely different clinical pictures once you see the full panel. The purpose of the comprehensive lab work is to make the pattern visible.
What actually addresses HPA dysregulation
Here is where I push back hard against the supplement-shelf version of this conversation. "Adrenal support" supplements containing licorice, ashwagandha, rhodiola, and adaptogen blends are sold as if they fix HPA dysregulation. Some have modest effects on perceived stress. None of them address the underlying physiology in a way that produces durable change in the cortisol rhythm.
What actually works:
Sleep architecture restoration. Cortisol rhythm and sleep architecture are bidirectionally linked. Untreated sleep apnea, late blue light exposure, irregular sleep timing, and alcohol within three hours of bed all flatten the cortisol curve. Fix what is fixable here first, because hormone interventions on a foundation of disrupted sleep are inefficient.
Addressing the actual stressors. Chronic relational stress, chronic financial stress, chronic over-training, chronic under-eating — these are physiological inputs to the HPA axis. They cannot be supplemented around. Sometimes the right clinical recommendation is to acknowledge that the patient's lifestyle is driving the picture and the supplement aisle will not fix it.
Replacing what has actually become deficient. Progesterone deficiency is common in patients with chronic HPA dysregulation, and bioidentical progesterone restoration often improves both sleep and the cortisol rhythm. This is one of the most useful interventions in the right patient. DHEA replacement is appropriate in some patients with documented low DHEA-S.
Thyroid correction when conversion is impaired. Patients with elevated reverse T3 and suppressed free T3 often need a T3-containing thyroid medication (compounded T3, liothyronine, or natural desiccated thyroid) rather than levothyroxine alone. The standard "TSH is normal, you are fine" response misses this entirely.
Sex hormone optimization where the labs warrant it. Estradiol, progesterone, and testosterone restoration in hormone optimization candidates frequently improves the cortisol rhythm secondarily, because the crosstalk runs both ways.
Targeted low-dose hydrocortisone in the rare patient with documented adrenal insufficiency confirmed on stimulation testing — uncommon, but I will not ignore it when it shows up.
What I look for in deciding what to do first
Sequencing matters. A patient with severely disrupted sleep, untreated sleep apnea, frank thyroid dysfunction, and a flattened cortisol curve does not get a sex hormone prescription on visit one. The order I work in: rule out primary medical issues, address foundational sleep and lifestyle inputs, correct frank thyroid dysfunction, replace clearly deficient hormones (progesterone first in most women, then estradiol and testosterone as the picture clarifies), reassess at three months.
The concrete next step
If your sleep is broken in the 3 AM pattern, your energy is inverted (tired during the day, wired at night), your weight has shifted to the abdomen, and you have been told your labs are normal, the first step is getting the right labs. A standard TSH and a 7 AM cortisol are not the right labs for this picture.
Book a hormone consultation specifically — at the Columbus location or the Warner Robins location, whichever is closer for you. Bring whatever lab work you have from the past twelve months so we are not duplicating tests unnecessarily. Bring a written list of your symptoms with approximate onset, and any medications and supplements you are currently taking. The first visit is the comprehensive history and the lab order. The second visit is the data review and the actual treatment plan.
If you want a structured starting point before you book, the hormone health assessment walks you through the symptom pattern questions in five minutes and tells you whether the picture warrants the workup. The patients who arrive with the assessment in hand tend to have a sharper first conversation, because we are already working from shared data.
The goal is not to chase the latest cortisol supplement. The goal is to identify the actual physiology, intervene where intervention is justified, and recheck at three months to see whether the plan is producing the result. That is what the workup is for, and that is the conversation I would rather have than the "your labs are normal, try to manage your stress" version.
Medical disclaimer: This article is for educational purposes only and does not constitute medical advice. Individual clinical decisions should be made in consultation with a qualified healthcare provider following appropriate evaluation. References to specific treatments, dosing, or protocols are informational.
Travis spent 17+ years in high-acuity clinical medicine — emergency, cardiac ICU, and cath lab — before founding Revitalize. He is a Certified Platinum Biote hormone therapy provider, the published author of You're Not Broken — You're Unbalanced, and the founder of the Rebuild Metabolic Health Institute. His clinical writing reflects the same precision he brought to critical care: specific, honest, and built around what actually works.
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