Is morning cortisol enough or do I need a 4-point salivary?

AM serum is the screening tool. If symptoms warrant deeper investigation, a 4-point salivary (cortisol awakening response) is the next step.

Cortisol (AM)

Cortisol is the adrenal stress hormone, highest in the morning and lowest at night. AM cortisol is the standard screening read. Too high (Cushing's, chronic stress) or too low (adrenal insufficiency) both cause real symptoms; the rhythm matters as much as the absolute number.

Category: Hormones
Units: nmol/L
Reference range: 138-690 nmol/L (8am draw)

What does a high Cortisol (AM) result mean?

Chronic stress, undiagnosed Cushing's (rare), exogenous corticosteroids, sleep deprivation, severe overtraining.

What does a low Cortisol (AM) result mean?

Adrenal insufficiency (Addison's, rare), long-term corticosteroid suppression, chronic stress exhaustion.

Why does Cortisol (AM) matter?

Symptoms commonly attributed to 'adrenal fatigue' are real — but the underlying cause is rarely adrenal. Cortisol bloodwork is the first step in actually diagnosing the picture.

FAQs

Is morning cortisol enough or do I need a 4-point salivary?: AM serum is the screening tool. If symptoms warrant deeper investigation, a 4-point salivary (cortisol awakening response) is the next step.

Want Cortisol (AM) interpreted in the context of your full panel? Every FORM bloodwork tier covers it, with an MD walking you through the result.

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