Blog — functional medicine testing

Chronic stress, fatigue, anxiety, and poor sleep may be signs of cortisol imbalance. Learn how stress and sleep hormone testing — including the Cortisol Awakening Response (CAR) and diurnal cortisol rhythm — can identify HPA axis dysfunction and help uncover the root cause of burnout, energy crashes, and disrupted sleep.

Female hormone profiling evaluates key reproductive, adrenal, and thyroid hormones together to reveal patterns that single tests may miss. By analyzing hormone balance through saliva or blood spot panels, clinicians and patients gain clearer insight into symptoms such as irregular cycles, fatigue, mood changes, fertility concerns, and menopause transitions—supporting more personalized and effective care.

Cortisol testing helps evaluate how the body responds to stress by measuring daily hormone patterns linked to energy, sleep, mood, and immune balance. Through saliva and blood spot methods, clinicians can identify adrenal and HPA-axis imbalances early, enabling more personalized strategies to address fatigue, burnout, and stress-related health concerns.

The MediCARE Specialized Blood Spot Test uses advanced dried blood spot technology to deliver accurate, Medicare-eligible insights into hormone balance, cardiometabolic risk, heavy metal exposure, and Vitamin D status—using a simple, at-home finger-prick sample with laboratory-grade reliability.

Learn the key differences between EIA, ECLIA, and mass spectrometry hormone testing methods, and discover why ZRT Laboratory’s long-standing use of LC-MS, GC-MS, and ICP-MS delivers gold-standard accuracy for advanced hormone analysis.