The HPA Axis: Cortisol, Stress, and Adrenal Health with Dr. Rose
Episode Summary
Cole Siefer sits down with Dr. Sasha Rose, a naturopathic physician and lead provider at Med Matrix with over 20 years in functional medicine, to walk through the HPA axis: the pathway connecting the hypothalamus, pituitary, and adrenal glands that governs the body's cortisol and stress response. Dr. Rose explains the normal daily cortisol rhythm (high in the morning, low at night) and why the popular term adrenal fatigue is not an actual clinical diagnosis but usually points to cortisol dysregulation. She maps the stages of dysregulation, from a hyperactive, always-on state to a low-functioning, flattened cortisol curve, and describes the patients she sees most often, including the driven 20-something in sympathetic overdrive and the exhausted working mother. The conversation covers practical levers Med Matrix uses: salivary cortisol testing for a 24-hour picture, adaptogenic herbs, peptides, sleep and caffeine habits, nutrition, and rebalancing movement like yoga. Dr. Rose also connects the HPA axis to gut and liver health, cholesterol and hormone production, mitochondrial function, early childhood trauma, and immune resilience. A patient case study and a short Q&A round out the episode.
Key Topics
- 1
What the HPA axis is: hypothalamus, pituitary, and adrenal glands working as a pathway
- 2
The normal daily cortisol rhythm and why the timing of a blood draw matters
- 3
Why adrenal fatigue is not a real clinical diagnosis (versus Addison's and Cushing's disease)
- 4
The stages of cortisol dysregulation, from sympathetic overdrive to a flattened cortisol curve
- 5
Common patient profiles: the driven 20-something and the exhausted working mother
- 6
Salivary cortisol testing to map the 24-hour rhythm, plus adaptogenic herbs and peptides
- 7
Building a healthy relationship with coffee and caffeine, and when to stop drinking it
- 8
How gut, liver, cholesterol, and mitochondrial health intersect with the HPA axis
- 9
How early childhood trauma wires the stress response and how it can be re-regulated
- 10
Why functional medicine's longer visits allow root-cause work that the insurance model does not
Quotable Moments
“We can't necessarily change the external circumstances of our life. We have these responsibilities. We don't always have control over changing those, but we do have control over our internal response to them.”
“If you actually have adrenal fatigue, it means you have Addison's disease, which again most of us do not. Usually when people use that term, what they mean is some type of dysregulation with cortisol.”
“But it's the people that really resist. Those are the ones that need it the most.”
“We are wired to survive, and part of how we survive is that high cortisol output. It's being hypervigilant. It's staying alert. It's looking out for danger. And that becomes wired.”
“There's nothing in life that you want to just cover up and postpone till later. Every time you do that, when you ignore issues, they get worse.”
Treatments Mentioned
FAQ
Hormones FAQ
HPA stands for hypothalamus, pituitary, and adrenal glands. It works as a pathway: the hypothalamus releases a hormone that stimulates the pituitary, which then signals the adrenal glands to produce cortisol. Dr. Rose describes the HPA axis as being in charge of a healthy cortisol and stress response.
Dr. Rose explains that adrenal fatigue is not an actual clinical diagnosis. True adrenal failure is Addison's disease, which is rare. When most people say adrenal fatigue, what they usually have is some form of cortisol dysregulation, where the normal daily rhythm of cortisol is off.
Cortisol is measured on the initial blood panel, and because levels change throughout the day the timing of the blood draw matters. For a fuller picture, Dr. Rose may order a salivary test that maps the 24-hour cortisol rhythm, showing the morning peak and overnight levels so she can see where someone falls on the spectrum of dysregulation.
Dr. Rose generally suggests stopping caffeine by around noon, or by 3 p.m. for people who are less sensitive to it. This assumes you want to be asleep between roughly 10 p.m. and midnight and awake in the early morning. People on night or shift work are an exception and may need a different schedule. One to two cups in the morning is usually a reasonable amount for most people.
In early years the nervous system and stress response are still forming and malleable. If a child does not feel safe, the body learns to stay hypervigilant with high cortisol output, and that pattern can become wired in. Dr. Rose notes that with time and support, such as therapy and other tools, the cortisol rhythm can begin to re-regulate so a person can physiologically feel safe again.
Dr. Rose points out that conventional visits are often only 7 to 15 minutes and frequently do not include hormone or cortisol testing, so patients may be offered a stimulant or antidepressant without an underlying picture. At Med Matrix, longer 60-minute and 30-minute visits give providers time to test more thoroughly and look for the root cause of fatigue and stress for each individual.
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