Deep Dives Hormones

Reading a cortisol curve: the shapes, and what each one means

Learn to interpret a cortisol result properly: what serum, saliva and urine each actually measure, the timing error that makes most curves meaningless, the four recognisable shapes and what they are honestly associated with, and where curve reading has to give way to a real diagnostic pathway.

Written by a working longevity centre, not a marketplace

Reviewed by Team SOMA
Last updated August 2026 · English

What you'll be able to do

  • What serum, saliva and urine each measure, and why they disagree
  • The timing error that makes most curves meaningless
  • The four recognisable shapes, and what each is honestly associated with
  • What a flattened curve does and does not license
  • Where curve reading has to stop and a real diagnostic pathway begins

What's inside

Before you read

The deep reading

The case

Check yourself

In practice

Is this for you?

Who it's for

  • Anyone with a result in hand who wants the reasoning, not only the conclusion
  • People with no medical training - every technical term is explained the moment it appears
  • Practitioners who want the thinking behind a number rather than a protocol

What you need

  • No prior training. Every technical term is explained in plain words the first time it appears.
  • A willingness to read something twice.

About this Deep Dive

A cortisol curve is, before anything else, a record of when the samples were taken. Get the timing wrong and the shape describes the schedule rather than the person.

What this covers

  • What serum, saliva and urine each measure, and why they disagree
  • The timing error that makes most curves meaningless
  • The four recognisable shapes, and what each is honestly associated with
  • What a flattened curve does and does not license
  • Where curve reading has to stop and a real diagnostic pathway begins

How it is built

Five parts, taken in order: a short orientation, the reading itself, one worked case, a check to see whether it landed, and a page on what changes once you have it. About forty minutes, and it is written to be read twice. There is no certificate here — that is what the Certified Programmes are for.

Who wrote it

SL
SOMA Longevity Sciences

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