Determining cortisol in saliva is a simple and non-invasive method for examining the level of the stress hormone.
Why saliva? 
– The sample collection process is simple and non-invasive
– It is possible to collect several samples at different times of the day
– Salivary cortisol is less susceptible to stress-induced spikes
– Free cortisol is measured in saliva, not protein-bound cortisol
– Useful for studying sleep and stress (taking into account circadian rhythms)
What is it used for?
Adrenal gland diseases (Cushing's syndrome, Addison's disease) Assessing the impact of stress on the body Studying the causes of sleep disorders Monitoring treatment for adrenal gland diseases
Circadian rhythm and sleep disorders
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