Evidence check: Cortisol senken in the context of fatigue

The idea of lowering cortisol to combat fatigue is popular in wellness circles, but the evidence is limited. Consumer cortisol tests (e.g., saliva, hair) are not diagnostic. While chronic stress can elevate cortisol, true cortisol disorders (Cushing's, Addison's) require medical testing. The concept of 'adrenal fatigue' is not supported by endocrinology guidelines. Lifestyle measures like sleep hygiene, exercise, and stress reduction may help, but their effect on cortisol is variable. Medications or supplements that claim to lower cortisol (e.g., ashwagandha) have small, inconsistent studies. Always consult a doctor before interpreting cortisol results or starting supplements. Evidence: practice/marketing.