A cortisol awakening response (CAR) test measures cortisol at several points after waking as part of a wider daily profile. It reports the markers included in the panel; it does not diagnose the cause of fatigue, sleep problems or other symptoms.
The Male Cortisol Awakening Response (CAR) Test and Female Cortisol Awakening Response (CAR) Test uses saliva and LC-MS/MS. It measures cortisol on waking, 30 minutes later, 60 minutes later, at midday, in the evening and at night, plus DHEAS.
Why collect several samples?
The three morning measurements show cortisol values at different times after waking, while the later samples add readings from other parts of the day. The product instructions say to collect the first sample within five minutes of waking, then the next two at 30 and 60 minutes. Follow the full kit instructions for timing and sample handling.
What can the results tell you?
The report provides measurements for the markers included in the panel, with male-specific reference ranges and specialist doctor interpretation. These results do not, by themselves, diagnose an adrenal or sleep disorder, prove that cortisol is causing symptoms, or determine a treatment plan. Review them with a qualified healthcare professional alongside your history and other clinical information.
Explore the test
See the Male Cortisol Awakening Response (CAR) Test and Female Cortisol Awakening Response (CAR) Test for the complete collection instructions and current test details. The product page states that results are available within 3–5 working days after the laboratory receives the samples.
This article is for general information only, not medical advice. Discuss persistent symptoms and test results with a qualified healthcare professional.