Free cortisol measurement in saliva is a very convenient assessment of adrenal gland function. Sustained abnormally high or low cortisol levels are often found in people with adrenal imbalance.
Adrenal dysfunction may be a factor in many related clinical conditions that include fibromyalgia, hypothyroidism, chronic fatigue syndrome, and premature menopause.
Saliva cortisol test is recommended for patients with e.g. reduced tolerance for stress, fatigue, sleep disturbances and depression.