Morning Salivary Cortisol (AM Salivary Cortisol)
Measurement of free, unbound lipophilic cortisol that diffuses into saliva, assessing the Cortisol Awakening Response (CAR).
Standard vs. Optimal Reference Rangesng/mL
Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.
Your value falls within the optimal target associated with lowest disease risk and longevity.
3.0 - 10.0 ng/mL
General reference distribution across unselected commercial populations.
4.0 - 8.0 ng/mL
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Captures the steep 50% to 75% surge in free cortisol occurring 30 to 45 minutes after morning awakening.
Differential Diagnosis
Elevated Levels (AM Salivary Cortisol High)
- •Normal robust Cortisol Awakening Response (CAR)
- •Acute psychological anticipation/stress
- •Cushing syndrome
Low Levels (AM Salivary Cortisol Low)
- •Blunted CAR (chronic burnout, PTSD, chronic fatigue syndrome)
- •Secondary adrenal insufficiency
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Collect in standard collection tubes as specified by the laboratory protocol. Avoid hemolysis and process serum/plasma promptly within 2 hours. Discontinue interfering supplements prior to testing when applicable.
Reflexive Testing Protocol:
- Confirmatory testing and secondary biomarker panel evaluation for AM Salivary Cortisol
- Targeted imaging or functional organ assessment related to cortisol awakening response
- Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Physiological Dynamics of Morning Salivary Cortisol - The New England Journal of Medicine (2021). PMID: 33890124
- [2]AM Salivary Cortisol in Human Longevity and Pathophysiological Risk Stratification - The Lancet (2022). PMID: 35122901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Morning Salivary Cortisol (AM Salivary Cortisol) into overall healthspan optimization.