ZRT Cortisol Awakening Response - CAR

The Cortisol Awakening Response (CAR) reveals more detailed clues that help in assessing adrenal gland function and conditions related to abnormal cortisol levels.

Collect six saliva samples in one day, at home, and then mail to a CLIA lab to be analyzed for cortisol hormone levels.

The hormone test kit includes six vials for saliva.  The first three samples are captured in the first hour to determine your morning response, and the remaining three samples are to be collected through to the end of your day. 

Price: $199.00

The Cortisol Awakening Response (CAR) reveals more detailed clues that help in assessing adrenal gland function and conditions related to abnormal cortisol levels. Here are some symptoms and conditions that might prompt such a test:

Collecting saliva samples six times in a 24-hour period, especially with the first three samples collected in the morning, helps in charting the diurnal (daytime) variation in cortisol levels. This can provide valuable information about the adrenal glands' function and the body's stress response.

  • Suspected Adrenal Fatigue or Dysfunction: If a person is experiencing symptoms such as chronic tiredness, fatigue, muscle weakness, and unexplained weight loss, a practitioner might suspect adrenal insufficiency or fatigue. Testing cortisol levels may help in a determination of possible causes.

  • Cushing's Syndrome: This is a condition caused by high cortisol levels for a prolonged period. Symptoms include weight gain, particularly around the abdomen and face, a flushed and round face, high blood pressure, osteoporosis, and changes in skin condition (like bruising easily and purple stretch marks).

  • Addison's Disease: This is the opposite of Cushing's Syndrome and is characterized by too little cortisol. Symptoms can include fatigue, muscle weakness, weight loss, low blood pressure, and darkening of the skin in certain areas.

  • Chronic Stress: Chronic stress can lead to dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis, affecting cortisol levels. Symptoms might include fatigue, anxiety, depression, and irritability.

  • Sleep Disorders: Abnormal cortisol levels can affect sleep patterns. Testing cortisol may help any individual having difficulty sleeping or feels not rested after sleep.

  • Evaluating the Diurnal Cortisol Curve: Normal cortisol levels vary throughout the day. They are usually higher in the morning upon waking and decrease throughout the day. Abnormal patterns, such as flat curves or levels that are high at night, can suggest health issues.

Cortisol Awakening Response Sample Collection

6-Tube Saliva Collection: Six cortisol collections in 24 hours is the most common method for assessing CAR. Start saliva collection within five minutes of waking for the day, followed by a second sample at 30 minutes, and a third sample at 60 minutes. The rest of the diurnal rhythm can be assessed at the normal time intervals – noon, evening and night. Click here for more collection instructions.

CAR testing button


Medical Disclaimer

This at-home hormone test is intended for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Do not disregard professional medical advice or delay in seeking it because of something you have read or interpreted from this test or any information on this website. Results from this test should be discussed with a healthcare professional for proper evaluation and interpretation.

Shipping Terms 

Orders generally ship within 24 Hours of purchase (M-F), and if orders are received before 11 a.m. Pacific Time; but not guaranteed.

Requests for two-day delivery must be received by 11 a.m. Pacific Time (M-F) to ship the same day. Delivery does not include weekends or holidays, and may not be available in all areas. If two-day shipping is ordered on a Friday before 11 AM, PST delivery will be on Tuesday.

Tracking info will be emailed to you once the order is shipped. 

It is the receiver's responsibility to pay any sales and/or country taxes, international import fees, and customs duties.

If ordering outside the U.S. you are responsible for your own return shipping.

We cannot accept orders from New York State.

Shipping Fees 

Average delivery times do not include weekends or holidays.

Delivery Type Expected Delivery Time  Cost

UPS Ground
USPS Priority

3-6 business days (within the US)

Shipping is free within the US on orders over $100.00

Shipping is $10.00 within the US on orders under $100.00

2-day (within the US) 2 days (excludes Saturday and Sunday) $17.00
Next day (within the US) is not available 1 day (excludes Saturday and Sunday) N/A
International (Canada & Mexico) 5-10 days $32.00  (You are responsible for your own return).
International (all other nations) 5-10 days

$37.00 (You are responsible for your own return).

 

Return & Cancellation Policy 

  • You are eligible for a 100% refund less a 4% processing fee on any confirmed order that is canceled prior to shipping.
  • Shipped test kits returned are eligible for a full refund less the 4%processing fee and non-refundable shipping fee.
  • Your original Test Requisition form must be returned to Canary Club before any refunds can be issued. Do not return the whole kit, only the requisition form, by regular mail to Canary Club - 422 Larkfield Center, Santa Rosa, CA 95403
  • Kits over 1-year-old are not eligible for a refund.
  • Credit card refunds can take up to 30 days to be processed by your bank or credit card company.

State and Sales Taxes

The purchase of our services is exempt from state and sales tax charges, ensuring clear and straightforward pricing without additional costs.

Lab
ZRT Yes
Adrenal
Cortisol Yes (6 tests)
Sample Type
Saliva Yes

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