Cortisol, Serum

Other names: CORTISOL, TOTAL, Cortisol, Serum LCMS, Cortisol, Serum LCMS, Endo Sci, CORTISOL, RANDOM, CORTISOL, TOTAL, LC/MS/MS

check icon Optimal Result: 2.3 - 19.4 µg/dL, or 63.46 - 535.25 nmol/L.

Cortisol is a steroid produced and secreted by the adrenal glands. Levels follow a pattern called “diurnal variation,” peaking in the early morning then declining throughout the day and reaching the lowest level at night. Cortisol affects many different body systems, including: bone growth, blood pressure control, immune system function, metabolism of fats, carbohydrates, and protein, and nervous system function. Additionally, our brain releases a chemical called adrenocorticotropic hormone in response to threatening stimuli. This triggers your adrenal glands to release cortisol and adrenaline, giving you a burst of new energy and strength. Cortisol tests are done to check for increased or decreased cortisol production, which is an indication of how well the pituitary and adrenal glands are working.

Tests may also be ordered when women have irregular menstrual periods and increased facial hair or when children have delayed development and short stature.

The fight or flight response which triggers a release of cortisol is a natural and necessary tool for our survival. However, in our modern world threatening situations usually take the form of bills and deadlines not bears and tigers. Our bodies have a limiting response when a threat passes that brings cortisol levels back to baseline; however, when stressors are always present cortisol levels remain elevated. This long-term activation and subsequent overexposure to cortisol and other stress hormones can disrupt almost all of our body’s processes. This puts us at risk for a number of serious health problems, including:

            -Anxiety

            -Depression

            -Digestive problems

            -Heart disease

            -Weight gain

            -Sleep problems 

Normal Ranges in µg/dL?:

AM Reference range 6.7-22.6 

PM Reference range 2.0-14.0 

What does it mean if your Cortisol, Serum result is too high?

Elevated cortisol levels in the serum, a condition known as hypercortisolism or Cushing's syndrome when severe, can result from various causes, including physiological, pathological, and exogenous factors. Cortisol, a glucocorticoid hormone produced by the adrenal glands, plays a critical role in the body's response to stress, regulation of metabolism, and maintenance of blood pressure and immune function. Physiological causes of elevated cortisol include stress (psychological or physical), intense exercise, and pregnancy. Pathological causes are more concerning and include conditions such as Cushing's disease, where a pituitary adenoma secretes excessive adrenocorticotropic hormone (ACTH), stimulating the adrenal glands to produce more cortisol. Other causes include ectopic ACTH production by non-pituitary tumors, primary adrenal tumors, and adrenal hyperplasia. Additionally, exogenous administration of corticosteroids, commonly used to treat inflammatory conditions, can lead to elevated serum cortisol levels.

Symptoms of elevated cortisol can vary but often include weight gain, particularly around the abdomen and face (leading to a "moon face" appearance), thinning skin, easy bruising, muscle weakness, fatigue, and hypertension. Psychological symptoms such as anxiety, irritability, and depression are also common. Chronic exposure to high cortisol levels can lead to more severe health issues such as type 2 diabetes, osteoporosis, and cardiovascular diseases.

Treatment of elevated cortisol levels depends on the underlying cause. If the elevation is due to exogenous corticosteroid use, gradually tapering off the medication under medical supervision can help restore normal cortisol levels. In cases of endogenous causes like Cushing's disease, treatment may involve surgical removal of the pituitary adenoma or other tumors secreting ACTH. Pharmacological treatments such as steroidogenesis inhibitors (e.g., ketoconazole, metyrapone) can help reduce cortisol production in cases where surgery is not feasible. Radiation therapy is another option, particularly when tumors are not entirely resectable. For adrenal tumors, adrenalectomy may be indicated. Alongside these treatments, lifestyle modifications, such as reducing stress, improving sleep, and maintaining a balanced diet, can help manage cortisol levels and alleviate symptoms. Regular monitoring and a tailored approach by healthcare professionals are essential to effectively manage and treat elevated cortisol levels, ensuring long-term health and quality of life.

What does it mean if Cortisol levels are only slightly elevated?

When cortisol levels are only slightly elevated, it is often referred to as mild hypercortisolism. This can be due to less severe or more transient factors compared to the significant elevations seen in conditions like Cushing's syndrome. Several factors can lead to mildly elevated cortisol levels, including chronic stress, anxiety, lack of sleep, excessive caffeine intake, and moderate to intense physical activity. Additionally, conditions such as obesity, depression, poorly controlled diabetes, and certain medications (like oral contraceptives or anticonvulsants) can also cause a slight increase in cortisol levels.

Mild elevations in cortisol may not cause the dramatic symptoms associated with more significant hypercortisolism, but they can still lead to various subtle or nonspecific symptoms. These may include fatigue, irritability, weight gain (especially in the abdominal area), difficulty concentrating, mild hypertension, and a weakened immune response, making an individual more susceptible to infections. Over time, even slightly elevated cortisol can contribute to more serious health issues like metabolic syndrome, which includes increased risk factors for heart disease, stroke, and type 2 diabetes.

Addressing slightly elevated cortisol levels involves identifying and managing the underlying causes. For stress-related elevations, lifestyle modifications such as regular physical exercise, mindfulness practices like meditation and yoga, adequate sleep, and a balanced diet can help reduce cortisol levels. Managing psychological stress through counseling or stress management techniques is also beneficial. If sleep disorders are contributing, improving sleep hygiene or seeking treatment for conditions like insomnia or sleep apnea may be necessary. Reducing caffeine and alcohol consumption can also help lower cortisol levels. In cases where medications are suspected to be the cause, consulting with a healthcare provider to adjust dosages or switch to alternative medications can be helpful.

Regular monitoring of cortisol levels and overall health is essential, as mild hypercortisolism can sometimes progress to more severe forms if left unaddressed. Healthcare providers may also recommend periodic testing and follow-up to ensure cortisol levels return to normal and to prevent potential long-term complications. A holistic approach, focusing on both physical and mental well-being, is key to managing slightly elevated cortisol levels effectively.

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What does it mean if your Cortisol, Serum result is too low?

A low level of cortisol may indicate Addison’s disease, a disorder in which the adrenal glands do not produce sufficient steroid hormones. Symptoms include: weight loss, fatigue, low blood pressure, abdominal pain, and dark patches of skin. You may also have hypopituitarism, which occurs when cortisol production by the adrenal glands is low because the pituitary gland is not sending proper signals. 

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