In today’s world, stress is rarely a short-term event. For many people, it is a constant background state — and the body’s stress response system was not designed for that.
At the centre of the stress response are the adrenal glands — two small glands that sit above the kidneys and produce cortisol, adrenaline, DHEA, and other hormones that regulate how the body responds to physical and psychological demands.
What Is Cortisol and Why Does It Matter?
Cortisol is the body’s primary stress hormone. It follows a natural daily rhythm — rising sharply in the morning to support alertness and energy, then gradually declining through the day to allow rest and recovery at night.
Cortisol plays a role in:
- Regulating blood sugar
- Supporting immune function
- Managing inflammation
- Controlling energy metabolism
- Influencing mood and cognitive function
- Regulating sleep-wake cycles
When cortisol patterns are disrupted by chronic stress, the effects can be felt across virtually every system in the body.
Signs of Cortisol Imbalance
Both chronically high and chronically low cortisol can cause significant symptoms.
High Cortisol Symptoms
- Difficulty sleeping despite feeling tired
- Anxiety and racing thoughts at night
- Weight gain, particularly around the abdomen
- High blood pressure
- Irritability and mood swings
- Reduced immune resilience
- Blood sugar fluctuations
Low Cortisol Symptoms
- Profound fatigue, especially in the morning
- Difficulty getting out of bed
- Low blood pressure and dizziness
- Salt cravings
- Poor stress tolerance
- Brain fog and poor concentration
- Low mood and motivation
The Neurotransmitter and Cortisol Test measures daily cortisol patterns alongside key neurotransmitters — providing insight into how your stress physiology and brain chemistry interact throughout the day.
The HPA Axis: Your Stress Command Centre
The hypothalamic-pituitary-adrenal (HPA) axis is the body’s central stress regulation system. When the brain perceives a threat, it signals the adrenal glands to release cortisol. Under chronic stress, this system can become dysregulated — producing too much cortisol for too long, or eventually becoming depleted.
HPA axis dysregulation is associated with fatigue, anxiety, poor sleep, immune dysfunction, hormonal imbalances, and cognitive difficulties.
DHEA: The Adrenal Counterbalance
DHEA is another adrenal hormone that acts as a counterbalance to cortisol. It supports energy, immune function, mood, and cognitive resilience. DHEA naturally declines with age, and chronic stress can accelerate this decline.
A high cortisol-to-DHEA ratio is considered a marker of chronic stress burden and may be associated with accelerated ageing, fatigue, and reduced stress resilience.
The Women All-In-One Test – Hormones, Neurotransmitters & Heavy Metals includes DHEA alongside cortisol, female hormones, and neurotransmitters — providing a comprehensive view of adrenal and hormonal health.
How Adrenal Stress Affects Other Hormones
Chronic adrenal stress does not exist in isolation. Elevated cortisol can suppress thyroid function, disrupt sex hormone balance, impair insulin sensitivity, and reduce progesterone production. This interconnection means that adrenal dysfunction often presents alongside other hormonal imbalances.
For women experiencing fatigue, mood changes, and hormonal symptoms together, the Advanced Hormone, Stress & Thyroid Health Test Kit assesses adrenal hormones, sex hormones, and thyroid markers in a single comprehensive panel.
Frequently Asked Questions
What is adrenal fatigue?
Adrenal fatigue is a term used to describe a collection of symptoms — including profound tiredness, poor stress tolerance, and brain fog — thought to result from prolonged adrenal stress. While not a recognised medical diagnosis, many people find that addressing cortisol and adrenal patterns helps improve their symptoms.
How is cortisol tested?
Cortisol is best assessed through multiple saliva samples taken at different points throughout the day, capturing the natural daily rhythm rather than a single snapshot.
Can stress cause hormone imbalance?
Yes. Chronic stress and elevated cortisol can disrupt sex hormone production, thyroid function, and insulin sensitivity — contributing to a wide range of hormonal symptoms.
Final Thoughts
Your adrenal glands and cortisol patterns are at the heart of how your body manages stress, energy, and resilience. Understanding your own cortisol rhythm — and how it interacts with other hormones and neurotransmitters — may be a valuable step towards feeling more balanced, energised, and in control.
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.