Low Cortisol – The Circadian T3 Method (CT3M) Can Improve Cortisol Levels Throughout the Day

The Circadian T3 Method (CT3M) is a means of improving cortisol levels for thyroid patients. I originally created it because I had very low cortisol throughout the day. CT3M successfully raised my cortisol. I have been using CT3M for about twenty years and continue to be well.

There are many blog posts on CT3M that can be found on this site. Here is a good one to start with to get more information:

Someone said to me recently that they had heard that CT3M only works to improve low morning cortisol. This is not true. Sadly, this misinformation continues to be spread through a few Internet groups.

The net result is that many thyroid patients end up using hydrocortisone (HC) or adrenal glandulars in order to help improve their cortisol levels. Unfortunately, in many cases, this just causes the thyroid patients to produce even less of their own cortisol and makes them dependent on yet another medication. In many cases, the use of HC or adrenal glandulars makes little difference and can even make some patients feel worse.

So, what is the real truth?

CT3M can work incredibly well for many thyroid patients. It is capable of raising morning, afternoon and evening cortisol levels back to normal.

Sometimes, a dysfunctional cortisol pattern like very low morning cortisol, followed by high cortisol the rest of the day can also be corrected, simply by getting the cortisol production to be higher in the morning.

The most common cause of low cortisol in thyroid patients is not adrenal fatigue or tired adrenals (which I no longer believe in by the way). It is, in fact, dysfunction of the hypothalamic-pituitary system. Frequently, this is due to low T3 levels in that system. So, correcting this, using CT3M, can fix the root cause of the problem.

Many dysfunctional cortisol patterns can be addressed by the use of CT3M. It is definitely worth trying if the thyroid patient has low cortisol across the day, low morning cortisol followed by high cortisol or simply low morning cortisol.

CT3M does not always work and I have never said that it does. However, CT3M frequently does help and results in better cortisol levels throughout the day. This is why I continue to tell thyroid patients that CT3M is worth trying before the use of HC, or adrenal glandulars, is attempted. Because if CT3M is successful, it can make the thyroid patient feel really well as their own system begins to work as nature intended it to do.

Please do not believe everything you read or hear about on the Internet. Just because something is written about on other sites or groups does not make it true.

You may wish to ask, “Why should I believe what you are saying?”. The answer to this is simple but has several aspects to it:

  1. I created the protocol.
  2. I have been using it myself for around twenty years and it did correct my extremely low cortisol levels.
  3. I know more about how to use it successfully than anyone else.
  4. More importantly, I have worked with so many thyroid patients that I have a much larger experience of how well CT3M has performed than anyone else. For example, I used to run a forum that had well over four thousand members and a significant percentage of these were also using CT3M. This is just one patient group that I worked with and also does not account for those that simply used my books to implement CT3M.
  5. I know that CT3M it deals with a wide range of dysfunctional cortisol patterns, including lows throughout the day.

Please look at the posts about CT3M on this blog (there is a Tag called Circadian T3 Method which lists all the CT3M related blog posts) and read the Recovering with T3 book and The CT3M Handbook for more information.

Here are a couple of Success Stories from actual thyroid patients that also show that cortisol dysfunction across the entire day can be addressed using CT3M:

Best wishes,


Paul Robinson

Paul Robinson is a British author and thyroid patient advocate. The focus of his books and work is on helping patients recover from hypothyroidism. Paul has accumulated a wealth of knowledge on thyroid and adrenal dysfunction and their treatment. His three books cover all of this.

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  1. CJ Hinke on 27th November 2020 at 3:52 am

    If one’s primary hypothyroid symptom is sleeplessness, it takes a hige effort to screw up enough courage to start CT3M. (My successful dose, after much trial-and-error, is at 3am, and it took 12 changes of timings and dosage to get there. Yes, I can get back to sleep–my biggest fear! This fear held me back for 18 months while trying everything else I could think of.)

    Many hypothyroid patients were doing just fine on T4 before developing hypocortisol symptoms. These are so similar to hypothyroid symptoms. For me, sleeplessness, anxiety to point of panic, and deep depression, along with physical manifestations.

    If one is symptomatic, I think CT3M should be ANYONE’s first step. What have you got to lose? Furthermore, one should make only ONE change at a time and let it settle in for five days or a week before adjusting timing (first) and then dose (second).

    Endos or GPs will rarely point you in this direction but there is a wealth of information in Paul’s books for implementing CT3M for yourself. All you need is a coöperative prescribing physician.

    • Paul Robinson on 27th November 2020 at 9:34 am

      Hi CJ, thank you so much for this comment. You are absolutely right that many thyroid patients could benefit from CT3M but they often just put off the thought because they think it is going to be too difficult or cause sleep issues.
      Your comment may give some of these patients the encouragement to give it a go.
      Many thanks.

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