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When to test cortisol levels: For most average people without specific symptoms such as chronic fatigue or unexplained weight changes, cortisol testing usually isn’t necessary. Cortisol ...
Cortisol follows a circadian rhythm, and to accurately measure cortisol levels is best to test four times per day through saliva. An individual may have normal total cortisol but have a lower than normal level during a certain period of the day and a higher than normal level during a different period.
Blood, urine, and saliva tests can check cortisol levels. If your levels are found to be high, you first want to rule out whether or not you have an adrenal tumor producing cortisol, says Bancos.
Low-dose and high-dose variations of the test exist. [4] The test is given at low (usually 1–2 mg) and high (8 mg) doses of dexamethasone, and the levels of cortisol are measured to obtain the results. [5] A low dose of dexamethasone suppresses cortisol in individuals with no pathology in endogenous cortisol production.
Salivary cortisol is a good stress index, with increased levels of cortisol correlating positively with increased levels of stress. Cortisol levels rise slowly over time and take a while to return to base level, indicating that cortisol is more associated with chronic stress levels. [12]
Exercise is a great way to manage stress and lower your cortisol levels, according to Baptist Health. You should aim for at least 150 minutes of low- to moderate-intensity exercise per week.