Cortisol Morning - AM30

Cortisol, a glucocorticoid hormone produced in the adrenal cortex, plays a crucial role in the body's stress response system.  

The cortisol awakening response (CAR) is the significant rise in cortisol levels within 30 minutes of waking, often measured through saliva samples.  This response, peaking about 30 minutes after waking, reflects the health of the hypothalamic-pituitary-adrenal (HPA) axis and is essential for stress regulation. 

Abnormal CAR patterns can indicate issues like chronic stress, PTSD, and burnout. 

Accurate assessment of AM30 cortisol levels helps in understanding and managing various physiological and psychological conditions.

What is Cortisol?  [20.] 

Classified as a glucocorticoid hormone, cortisol is a crucial component of the body's stress response system.

It is synthesized from cholesterol through a series of enzymatic reactions in the zona fasciculata of the adrenal cortex.  Cortisol is produced in the steroidogenesis pathway, which encompasses the biosynthesis of steroid hormones from cholesterol. 

What is AM30 Cortisol?

AM30 Cortisol levels refer to cortisol levels 30 minutes after waking.  AM30 Cortisol is often tested in saliva.  

Accurate and reliable measurement of AM30 cortisol levels is an essential component in assessing the cortisol awakening response, or CAR.

Clinical Significance of the Cortisol Awakening Response

In healthy individuals, cortisol is expected to rise in the morning by as much as 50%, peak approximately 30 minutes after waking, and fall back to morning waking levels within 60 minutes of waking. [10.]   

This is called the Cortisol Awakening Response, or CAR, and it provides valuable insight into the functioning of the HPA axis.  [17.]

The AM30 cortisol measurement is an essential measurement in assessing the CAR.  

The CAR is clinically relevant because it reflects HPA axis function, which is associated with various physiological and psychological factors.  

Research suggests that a robust CAR is indicative of healthy stress regulation and adaptation, while blunted or exaggerated CARs are linked to conditions such as chronic stress, PTSD, depression, chronic fatigue, and burnout.  [8., 10., 17., 18., 22., 23.]

Assessing CAR through laboratory testing can aid in identifying dysregulations in the hypothalamic-pituitary-adrenal (HPA) axis, which plays a central role in the body's stress response system.  [1.]

Laboratory Assessment of AM30 Cortisol

Sample Types

Two primary methods are used for AM30 cortisol testing: serum/plasma cortisol assays and salivary cortisol assays. 

Serum or plasma cortisol assays measure the total amount of cortisol in the bloodstream, providing a snapshot of cortisol levels at the time of sample collection.  

Salivary cortisol assays, on the other hand, measure the bioavailable or free cortisol levels, which are believed to better reflect the physiologically active form of the hormone.

Laboratory Testing, Sample Collection and Timing

The CAR is often assessed via saliva samples of cortisol immediately upon waking, 30 minutes after waking,and 60 minutes after waking.  Alternatively, blood samples may be used, but this requires multiple blood draws within a short time. 

The timing of sample collection is critical for accurate AM30 cortisol measurement, as cortisol levels can fluctuate rapidly in response to various stimuli. 

Samples must be collected within 30 minutes of awakening, with the recommended window being as narrow as possible to minimize variability. 

Factors such as sleep quality, stress levels, and certain medications can influence cortisol levels and should be taken into account during sample collection.

Interpretation of AM30 Cortisol Results

Optimal Levels of AM30 Cortisol

The pattern of the CAR provides the most clinical information.  Optimally, levels of AM30 cortisol are expected to rise by about 50% from waking cortisol levels, then fall back to roughly the levels seen upon waking about 60 minutes after waking.  

This indicates a healthy HPA axis response.  Increased or decreased levels may have clinical relevance, as discussed below.  

Elevated Levels of AM30 Cortisol  [2., 3., 9., 24.] 

 An elevated cortisol awakening response (CAR) has been linked to various physiological and psychological factors.  

Chronic stress, worry, work overload, and acute stress exposure are known to contribute to a larger CAR.  [2., 3.]  

Additionally, research suggests that an elevated CAR may be a biological factor associated with impairments in cognitive functions such as error processing, conscious error perception, and subsequent behavioral adjustment in healthy populations.  [24.]

Furthermore, an abnormally high CAR could potentially indicate underlying neurological conditions: individuals with bilateral or unilateral hippocampus damage and hippocampal atrophy tend to lack a normal CAR, suggesting that an elevated CAR may be indicative of hippocampal dysfunction or atrophy, which can have implications for cognitive impairment.  [24.]

Certain environmental and lifestyle factors have also been shown to influence CAR levels. Morning light exposure, high-intensity exercise, greater physical activity levels, and short-term sleep deprivation have all been associated with an increase in CAR.  [3.]

It is important to note that the clinical significance of an elevated CAR should be interpreted in the context of an individual's overall health status, as well as other relevant biomarkers and diagnostic criteria.  

The CAR alone is not a definitive diagnostic tool but rather a potential indicator of underlying physiological or psychological conditions that warrant further investigation and evaluation.

Decreased Levels of AM30 Cortisol

A decreased or blunted cortisol awakening response (CAR) has been associated with various clinical conditions and psychological states including fatigue or pain.  [7.]

It has also been associated with conditions such as poorer general health, AIDS, cancer, post-traumatic stress disorder, chronic stress and burnout.  [7.]

It is important to note that the clinical significance of CAR abnormalities should be interpreted in the context of the individual's overall clinical presentation, as well as other relevant biomarkers and diagnostic criteria.  

Strategies to Support a Healthy CAR 

• Practice mindfulness-based stress reduction techniques, including meditation, deep breathing exercises, and yoga.  [21.]

• Engage in regular physical activity and ensure adequate sleep each night to support cortisol regulation.  [4.]

• Maintain a balanced diet rich in whole foods, while limiting caffeine, alcohol, and sugar intake to stabilize cortisol levels.

• Foster a supportive social network and seek professional counseling or therapy to address underlying stressors effectively.

• Consume a balanced diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats to provide essential nutrients for adrenal health and cortisol regulation.

• Incorporate foods high in magnesium, such as leafy greens, nuts, seeds, and legumes, which may help reduce cortisol levels and promote relaxation.

• Avoid excessive caffeine, refined sugars, and processed foods, as they can spike cortisol levels and contribute to chronic stress.  [5., 6., 12.] 

Supplements To Support A Healthy CAR:

• Herbal adaptogens: incorporate adaptogenic herbs like ashwagandha and holy basil into your routine to regulate cortisol levels and enhance stress resilience.  [11., 15.] 

• Explore supplements such as phosphatidylserine to support adrenal health, reduce inflammation and maintain cortisol balance.  [19.]

• Vitamin C: Supports adrenal gland function and cortisol production.  [14.]

• B Vitamins (B5, B6, B12): Essential for adrenal hormone synthesis and energy metabolism.

• Magnesium: Helps regulate cortisol levels and supports adrenal gland function.  [16.]

• Zinc: Supports immune function and aids in adrenal hormone production.

• Omega-3 fatty acids: Have anti-inflammatory properties and support adrenal health.  [13.]

Prior to initiating any new supplements it's crucial to consult with a healthcare provider, particularly if you have preexisting health conditions or are currently on medications, to guarantee safety and effectiveness.

Order Cortisol Awakening Response Testing

Click here to compare testing options and order testing for CAR assessment.