Adrenal Function Panel
This adrenal function blood test panel measures cortisol and related hormones plus electrolytes to help you interpret patterns behind fatigue or BP shifts.
This panel bundles multiple biomarker tests in one order—your report explains how results fit together.
This is a lab panel, meaning you get multiple related measurements in one order. Instead of trying to guess what one hormone “should” explain, an adrenal function panel helps you look at patterns across stress signaling (the HPA axis), salt-and-water balance (the renin–angiotensin–aldosterone system), and the electrolytes those systems influence.
That pattern-based view can be especially helpful when your symptoms are broad (fatigue, dizziness, palpitations, sleep disruption), when blood pressure is hard to control, or when results like sodium or potassium keep drifting without a clear reason.
Do I need this panel?
You might consider an adrenal function panel if you have symptoms that could relate to stress-hormone signaling or fluid and electrolyte regulation—especially when the story is not explained by one obvious issue. Common reasons include persistent fatigue, feeling “wired but tired,” sleep disruption, unexplained weight change, shakiness, frequent headaches, or episodes of lightheadedness.
This panel can also be useful when your blood pressure is unusually high, unusually low, or swings a lot. The adrenal glands help regulate vascular tone and salt balance through hormones like cortisol and aldosterone, and those effects often show up alongside changes in electrolytes (such as sodium or potassium).
If you take medications that affect blood pressure or fluid balance (for example, diuretics, ACE inhibitors, ARBs, beta blockers, steroids, or certain hormone therapies), a multi-marker panel can help you and your clinician separate medication effects from underlying physiology.
This panel is educational and supports clinician-directed care; it is not meant for self-diagnosis. If you have severe weakness, fainting, confusion, chest pain, or dangerously high blood pressure, seek urgent medical care rather than relying on outpatient testing.
Some adrenal markers vary by time of day, posture, recent stress, and medications; your clinician may recommend repeat testing or confirmatory dynamic testing based on your pattern of results.
Lab testing
Order the Adrenal Function Panel
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get tested with Vitals Vault
Vitals Vault makes it straightforward to order an adrenal function lab panel and get a coherent interpretation of how the results fit together. Because this is a panel, you are not just buying a single number—you are getting a set of related markers that can be reviewed as a pattern.
After your results post, you can use PocketMD to summarize the panel, translate medical terms into plain language, and generate questions to bring to your clinician—especially helpful when results are “borderline” or mixed across markers.
If you are monitoring a known condition or tracking how medication changes affect your physiology, repeating the same panel over time can be more informative than chasing one-off tests. Trend data helps you see whether a shift is likely a true change or a timing/collection effect.
- Order a single panel and review multiple adrenal-related markers together
- PocketMD can help you interpret patterns and prepare follow-up questions
- Useful for trending results after medication, lifestyle, or treatment changes
Key benefits of the Adrenal Function Panel
- Gives you a multi-marker view of adrenal signaling instead of relying on one cortisol value.
- Helps connect symptoms like fatigue, dizziness, and sleep disruption to measurable hormone and electrolyte patterns.
- Adds context for blood pressure swings by pairing aldosterone/renin signals with sodium and potassium.
- Supports medication review by showing how diuretics, steroids, and BP drugs may be influencing your labs.
- Improves follow-up planning by highlighting when repeat timing, posture control, or confirmatory testing may be needed.
- Helps differentiate “stress response” patterns from salt-balance patterns that can look similar symptom-wise.
- Makes it easier to trend changes over time using the same bundled panel and consistent interpretation workflow.
What is the Adrenal Function Panel?
The Adrenal Function Panel is a bundled set of blood tests that look at how your adrenal glands and related control systems are functioning. Your adrenal glands sit on top of your kidneys and produce hormones that help regulate energy availability, immune signaling, blood pressure, and fluid balance.
Because adrenal physiology is controlled by feedback loops, single tests can be misleading. For example, cortisol changes throughout the day and can rise with illness, poor sleep, pain, intense exercise, or psychological stress. Aldosterone and renin are strongly affected by posture, salt intake, hydration, and many common blood pressure medications. A panel approach helps you interpret these results in context.
In practice, this panel groups results into a few “themes”:
• HPA axis signaling: markers that reflect how your brain and pituitary communicate with the adrenal glands (often assessed with ACTH and cortisol).
• Androgen output: markers like DHEA-S (dehydroepiandrosterone sulfate), which can shift with age, chronic stress, and certain endocrine conditions.
• Salt-and-water balance: markers like aldosterone and renin (often interpreted as a ratio) that influence sodium retention, potassium excretion, and blood pressure.
• Electrolytes and related chemistries: sodium, potassium, bicarbonate (CO2), and sometimes glucose—useful for seeing downstream effects that make the hormone results more clinically meaningful.
What do my panel results mean?
Patterns that can look “low” across the panel
A “low pattern” often means one of two things: lower stress-hormone signaling (for example, low cortisol with an inappropriately low or normal ACTH) or lower salt-retaining signaling (for example, low aldosterone with low renin). When these patterns occur with low sodium, high potassium, low glucose, or low blood pressure symptoms (lightheadedness on standing, salt cravings), your clinician may consider adrenal insufficiency or medication-related suppression as part of the differential. Collection timing matters: a cortisol drawn late in the day can be naturally lower, and aldosterone/renin can read “low” if you were lying down, overhydrated, or on certain blood pressure medicines.
Patterns that are typically “optimal” or reassuring
A reassuring panel pattern is when cortisol and ACTH align with expected physiology for the collection time, DHEA-S is appropriate for your age and sex, and aldosterone/renin results make sense given your posture, salt intake, and medications. Electrolytes (sodium, potassium, bicarbonate) are usually in range and stable over time. Even with an overall reassuring pattern, you can still have symptoms from sleep debt, anemia, thyroid issues, infection/inflammation, overtraining, or medication side effects—so the panel is best used as one piece of a broader workup.
Patterns that can look “high” across the panel
A “high pattern” can also split into themes. Higher cortisol (especially if repeatedly high or paired with abnormal ACTH patterns) may reflect a strong stress response, medication effects (including steroid exposure), or less commonly an endocrine disorder that needs specialist evaluation. On the salt-balance side, a high aldosterone-to-renin pattern (or aldosterone that is high relative to renin) can be seen in forms of mineralocorticoid excess and may pair with high blood pressure and low potassium. Conversely, high renin with higher aldosterone can show up with diuretics, dehydration, low salt intake, or certain kidney/blood pressure physiology. Your clinician will interpret “high” in the context of symptoms, blood pressure readings, and medication timing.
Factors that influence adrenal panel results
Adrenal-related labs are highly context dependent. Time of day is critical for cortisol, which normally peaks in the morning and declines through the day. Acute illness, pain, poor sleep, heavy training, and psychological stress can raise cortisol and sometimes shift glucose and electrolytes. Posture and sodium intake can change aldosterone and renin substantially; many protocols specify being upright for a period of time before collection. Medications are a major confounder: steroids can suppress ACTH and endogenous cortisol; diuretics, ACE inhibitors, ARBs, beta blockers, and mineralocorticoid receptor antagonists can alter renin/aldosterone patterns; oral estrogen can change binding proteins and affect some hormone interpretations. Because of these influences, a single abnormal value often leads to repeat testing under standardized conditions rather than immediate conclusions.
What’s included in this panel
- Absolute Band Neutrophils
- Absolute Basophils
- Absolute Blasts
- Absolute Eosinophils
- Absolute Lymphocytes
- Absolute Metamyelocytes
- Absolute Monocytes
- Absolute Myelocytes
- Absolute Neutrophils
- Absolute Nucleated Rbc
- Absolute Plasma Cells
- Absolute Prolymphocytes
- Absolute Promyelocytes
- Absolute Reactive Lymphocytes
- Albumin
- Albumin/Globulin Ratio
- Alkaline Phosphatase
- Alt
- Ast
- Band Neutrophils
- Basophils
- Bilirubin, Total
- Blasts
- Bun/Creatinine Ratio
- C-Reactive Protein
- Calcium
- Carbon Dioxide
- Chloride
- Chol/Hdlc Ratio
- Cholesterol, Total
- Cortisol, A.M.
- Cortisol, P.M.
- Creatinine
- Dhea Sulfate
- Egfr
- Eosinophils
- Ggt
- Globulin
- Glucose
- Hdl Cholesterol
- Hematocrit
- Hemoglobin
- Hemoglobin A1C
- Homocysteine
- Insulin
- Ld
- Ldl-Cholesterol
- Ldl/Hdl Ratio
- Lymphocytes
- Magnesium
- Mch
- Mchc
- Mcv
- Metamyelocytes
- Monocytes
- Mpv
- Myelocytes
- Neutrophils
- Non Hdl Cholesterol
- Nucleated Rbc
- Phosphate (As Phosphorus)
- Plasma Cells
- Platelet Count
- Potassium
- Prolymphocytes
- Promyelocytes
- Protein, Total
- Rdw
- Reactive Lymphocytes
- Red Blood Cell Count
- Sodium
- Triglycerides
- Urea Nitrogen (Bun)
- Uric Acid
- Vitamin D, 25-Oh, D2
- Vitamin D, 25-Oh, D3
- Vitamin D, 25-Oh, Total
- White Blood Cell Count
Frequently Asked Questions
Is this a single cortisol test or a full adrenal lab panel?
It is a lab panel. You receive multiple related measurements (such as cortisol and ACTH, plus salt-balance hormones and electrolytes) so you can interpret a pattern rather than relying on one number.
Do I need to fast before an Adrenal Function Panel?
Fasting requirements vary by the exact components and the lab’s protocol. If glucose is included, fasting may be recommended for the cleanest interpretation. Follow the collection instructions you receive with your order, and ask your clinician if you are unsure.
What time of day should I get this panel drawn?
Cortisol has a strong daily rhythm, so morning collection is commonly preferred when evaluating baseline cortisol patterns. Aldosterone and renin can also depend on posture and timing. If your clinician is evaluating a specific condition, they may request a specific draw time and preparation steps.
Can medications change my adrenal panel results?
Yes. Steroids (including pills, injections, inhalers, and topical forms in some cases) can suppress ACTH and cortisol. Many blood pressure medications and diuretics can shift renin and aldosterone, which can change the aldosterone-to-renin ratio. Do not stop medications on your own; ask your clinician whether any holds are appropriate before testing.
How should I read mixed results across the panel?
Mixed results are common. The key is whether the values tell a coherent story together—for example, whether cortisol and ACTH “match” expected feedback patterns, and whether aldosterone/renin results align with sodium, potassium, blood pressure readings, posture, hydration, and medication use. PocketMD can help you summarize the pattern and generate targeted follow-up questions.
What if my results are abnormal—does that confirm an adrenal disorder?
Not necessarily. Because these markers are sensitive to timing, stress, illness, and medications, an abnormal result often leads to repeat testing under standardized conditions or to confirmatory dynamic testing ordered by a clinician. Treat the panel as a starting point for a structured evaluation.
Is it better to order this panel or order individual tests separately?
A panel is often more useful when you want context, because interpretation depends on how markers relate to each other (for example, cortisol with ACTH, or aldosterone with renin and electrolytes). Individual tests can be appropriate for narrow follow-up questions, but they can be harder to interpret in isolation.