Cortisol Curve (4-Point Saliva Adrenal Profile)

Beschrijving

Why This Test Matters

Cortisol is a cornerstone of the body’s stress response and circadian signalling. A single cortisol measurement provides only a moment-in-time snapshot and can be misleading. In contrast, a Cortisol Curve measures cortisol at multiple points throughout the day, revealing the biological rhythm of adrenal activity and how well the body is regulating stress and energy.

This test is particularly valuable when patients present with symptoms such as:

• Difficulty falling or staying asleep
• Persistent fatigue or low energy
• Poor stress tolerance
• Afternoon slumps
• Mood dysregulation
• Brain fog or cognitive fluctuation

A dysfunctional cortisol rhythm can be a key functional driver in these presentations and often responds well to targeted lifestyle and therapeutic interventions.

What the Test Measures

The Cortisol Curve evaluates salivary cortisol at four timed points over the day. By capturing cortisol over the circadian cycle, the profile reveals patterns not evident with isolated blood or urine measurements. These points may include morning awakening, late morning, afternoon, and evening — depending on the specific protocol.

Results help assess:

• Diurnal cortisol rhythm integrity
• Morning awakening response
• Midday and afternoon adrenal support
• Evening wind-down phase

This enables a much richer understanding of the hypothalamic-pituitary-adrenal (HPA) axis and its role in sleep, stress management, energy metabolism, and recovery.

When to Order

This test is recommended in cases of:

• Chronic stress or burnout
• Sleep disturbances (insomnia, early awakening, light sleep)
• Fatigue or low resilience
• Recurrent infections
• Anxiety or mood variability
• Long-term inflammatory conditions
• Unclear fatigue despite appropriate labs

It is also useful for monitoring response to lifestyle, nutritional, or medical interventions targeting stress regulation.

Interpretation — What You Can Learn

Unlike single point measurements, this profile gives insight into:

• Flattened rhythm (possible adrenal exhaustion or chronic stress adaptation)
• Elevated evening cortisol (associated with insomnia, nocturnal alertness)
• Low morning cortisol rise (linked to difficulty waking, fatigue)
• Excessive midday drop (linked to afternoon slumps)

Interpretation is grounded in functional endocrinology and is designed to integrate with clinical history, lifestyle context, and other laboratory findings.

Clinical Integration

Because cortisol interacts closely with other physiological systems, this profile is often paired with:

• Melatonin rhythm assessment (for sleep timing and circadian alignment)
• Neurotransmitter evaluation (for mood and stress response)
• Micronutrient panels (e.g., magnesium, B6, zinc)
• Organic acids testing (metabolic stress and detoxification pathways)

Together, these form a multidimensional view of stress physiology and support truly individualized care planning.

How This Test Works

Sample Type: Saliva

Collection Method:
Participants collect their own saliva samples at home at prescribed times, following detailed instructions included in the kit. This non-invasive method reflects biologically active cortisol levels throughout the day without the stress artifact of clinic draws.

Return & Processing:
Samples are shipped back to World Health Laboratories with pre-paid courier labels (where available) or via international shipment as arranged.

• Includes: Cortisol levels measured at different times of the day
• Sample requirement: Saliva collected at specific times

Suitable for postal submission.