What is the Normal Level of the Hormone Cortisol?

Cortisol is a steroidal hormone produced in the adrenal cortex, and majorly involved in the metabolism and immune response of our body. Though it is commonly known as the stress hormone, it affects the entire body. Normally, cortisol levels are the highest in mornings and dip very low in midnight. Very high or very low levels of cortisol can be alarming and require treatment.

It is released in high quantities in response to stress and low blood sugar levels. High levels of cortisol can cause Cushing’s syndrome, and low levels lead to Addison disease.

Reference level of blood plasma cortisol:

Morning: 140-700 nmol/L

Midnight: 80-350nmol/L

Get a detailed description of the hormone here.

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