Adrenal fatigue and HPA axis dysfunction treatment in Greenville, SC. Dr. Hendry restores energy, stress resilience, and hormonal balance. Call (864) 365-6156.
★★★★★
"I have been going to Dr. Hendry for 2 months now, for Acupuncture and Supplements. After 2 months, this is the best I have felt in over 2 years. My energy is so much better, my gut and digestion is back to normal."
— Danny Pyatt · March 2026 · Google Review
What Is Adrenal Fatigue?
Adrenal fatigue — more precisely called HPA axis dysfunction or cortisol dysregulation — describes a state in which the hypothalamic-pituitary-adrenal stress axis has become dysregulated after a prolonged period of physical, emotional, or physiological stress. Rather than truly exhausted adrenal glands, it typically involves abnormal cortisol rhythm: cortisol may be low in the morning (causing fatigue and difficulty waking), high in the evening (causing insomnia), or both — a loss of the normal diurnal pattern essential for energy, mood, and immune function.
Common Symptoms
Morning fatigue — difficulty waking even after a full night's sleep
Energy that improves through the day but dips in the early afternoon
Second wind in the evening — wired and alert when you should be winding down
Difficulty recovering from illness or stress
Salt and sugar cravings
Brain fog, difficulty concentrating, and poor memory
Heightened emotional reactivity, irritability, and reduced stress tolerance
Dizziness upon standing (orthostatic hypotension from low aldosterone)
Root Causes: A Functional Medicine Perspective
The HPA axis is the body's master stress regulation system. Prolonged physical stress (illness, surgery, extreme exercise), psychological stress, or physiological stressors (poor sleep, blood sugar dysregulation, infections, gut dysfunction) chronically activate the HPA axis. Over time, the system loses its normal diurnal rhythm — high cortisol in the morning to drive alertness, low cortisol in the evening to allow sleep.
Nutritional deficiencies — particularly vitamin C, B5 (pantothenic acid), magnesium, and adrenal-supportive herbs — impair adrenal function. Thyroid dysfunction and adrenal dysfunction are closely linked — each worsens the other. Chronic inflammation from gut dysbiosis, food sensitivities, or systemic infection maintains the HPA axis in a state of chronic activation.
How We Treat Adrenal Fatigue at IHP
Dr. Hendry measures cortisol rhythm using four-point salivary cortisol testing, which captures the cortisol curve throughout the day. This objective assessment guides the specific protocol needed: low morning cortisol requires different support than high evening cortisol, and each pattern responds to different adaptogenic herbs and timing strategies.
Treatment includes: adaptogenic herbs (ashwagandha, rhodiola, eleuthero, and licorice root — selected based on cortisol pattern), adrenal nutrient support (vitamin C, B5, magnesium), blood sugar stabilization (to prevent the cortisol spikes triggered by hypoglycemia), sleep optimization, and stress management strategies. Acupuncture regulates the HPA axis through hypothalamic and pituitary modulation, helping normalize the cortisol rhythm.
Dr. Hendry's Approach
I think about adrenal dysfunction as the body's rational response to unsustainable demand — not an organ failure, but a signaling problem. The HPA axis dysregulated because something asked too much of it for too long: chronic stress, poor sleep, blood sugar instability, gut inflammation, or some combination. The cortisol rhythm is the readout.
I test four-point salivary cortisol, not a single morning blood draw. The curve tells me whether someone has low morning cortisol dragging them out of sleep exhausted, high evening cortisol keeping them wired at midnight, or both simultaneously — which is more common than patients expect. Each pattern requires different adaptogenic herb selection, different timing strategies, and different lifestyle emphasis. Generic adrenal support without this data produces inconsistent results.
The term 'adrenal fatigue' is not in the conventional medical lexicon, but HPA axis dysregulation and abnormal cortisol rhythms are documented and measurable. Functional medicine testing (salivary cortisol rhythm) identifies dysregulated patterns that standard blood cortisol tests (taken at a single morning time point) miss.
Adaptogens are a class of herbs that help the body adapt to stress by modulating the HPA axis. Ashwagandha lowers chronically elevated cortisol and improves the cortisol awakening response. Rhodiola improves energy and stress resilience. Licorice root prolongs the active half-life of cortisol (useful for low morning cortisol patterns). Selection depends on each patient's specific cortisol pattern.
Mild HPA dysregulation typically improves within 2–3 months of targeted treatment. More significant dysregulation after years of chronic stress may require 6–12 months of sustained support. The timeline also depends on how well the underlying stressors are addressed.
High-intensity exercise acts as an additional stressor on an already taxed HPA axis and can worsen adrenal dysregulation. Gentle exercise (walking, yoga, swimming) supports recovery. Intensity is gradually restored as the HPA axis normalizes and energy levels improve.
Adrenal cortisol is essential for T4-T3 thyroid hormone conversion. Low cortisol impairs thyroid conversion, producing functional hypothyroid symptoms even with normal thyroid labs. Conversely, hypothyroidism stresses the adrenal system. These two systems must often be treated simultaneously for full recovery.
Standard blood cortisol tests — taken at a single morning time point — are inadequate for assessing HPA axis function. They detect extreme pathology (Addison's disease, Cushing's syndrome) but miss the dysregulated diurnal rhythm that characterizes functional adrenal insufficiency. The appropriate test is four-point salivary cortisol, which measures cortisol at waking, morning, afternoon, and evening — capturing the full daily curve. The diurnal pattern is as diagnostically important as absolute values. Dr. Hendry also tests DHEA-S alongside the cortisol curve, as DHEA reveals adrenal reserve that cortisol alone doesn't show.
Stabilizing blood sugar is the single most impactful dietary change — every blood sugar drop triggers a cortisol response, perpetuating HPA dysregulation. Regular meals with adequate protein, healthy fats, and fiber to slow glucose absorption are foundational. Foods rich in adrenal-supportive nutrients: vitamin C (bell peppers, citrus — the adrenal cortex has the highest vitamin C concentration of any tissue), pantothenic acid B5 (avocado, eggs — essential for cortisol synthesis), magnesium (leafy greens, pumpkin seeds — cortisol directly depletes magnesium), and sodium (adequate sea salt supports aldosterone-related blood pressure). Caffeine temporarily raises cortisol and can worsen dysregulated patterns, particularly in patients with high evening cortisol or poor sleep.
These are distinct conditions. Adrenal insufficiency (Addison's disease) involves immune destruction of the adrenal cortex to the point of dangerously insufficient cortisol production — it is life-threatening in severe form, requires steroid hormone replacement, and is detectable on standard blood testing. Adrenal fatigue (HPA axis dysregulation) involves an abnormal cortisol rhythm — typically suboptimal morning cortisol, elevated evening cortisol, or both — without the extreme deficiency of Addison's. The adrenal glands are structurally intact; the issue is upstream signaling dysregulation of the HPA axis. It requires different evaluation (salivary cortisol rhythm, not blood cortisol) and different treatment (lifestyle and adaptogenic herbs, not replacement steroids).
Yes — chronic stress is the primary driver of HPA axis dysregulation. When the stress response is repeatedly activated over months or years, the signaling between the hypothalamus, pituitary, and adrenals becomes dysregulated: the cortisol awakening response blunts, morning cortisol can become suboptimally low (causing fatigue and difficulty waking), and evening cortisol may remain abnormally elevated (causing insomnia). Psychological stress is only one category — physiological stressors have the same effect: chronic infections, gut inflammation, blood sugar dysregulation, and sleep deprivation all activate the HPA axis and contribute to the dysregulation pattern.