Cortisol Awakening Response (CAR) Doctor's Data

Note: This is a home collection test kit that will be mailed to you.

Fasting Required:
No
Specimen:
Saliva, 3 timed collections
Lab:
Labrix
Results:
Average processing time 3-5 business days
Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Description:  The cortisol awakening response is the natural rise in cortisol that is seen 30 to 40 minutes after awakening followed by a noticeable drop by 60 minutes. CAR can be utilized as a biomarker for assessment of the HPA axis function in routine clinical practice. CAR is influenced by overall HPA reactivity, as well as a person’s anticipation of stress.