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Understanding Morning Cortisol Samples and the HPA Axis
The chapter explores the complexities of collecting morning cortisol samples and the significance of accurately measuring the cortisol awakening response for cortisol testing. It discusses the Dutch complete and Dutch plus tests, detailing the importance of capturing the cortisol awakening response in samples. The conversation delves into various markers used to assess HPA function, including urinary metabolites and experimental biomarkers like hair cortisol, highlighting the role of the HPA axis as a surveillance system in responding to stress.