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Fibromyalgia, Chronic Fatigue and Low Body Temperature: What Dr. Wilson Has Written

September 1, 2026 · Wilson's T3 Editorial

Fibromyalgia and chronic fatigue syndrome are diagnoses of exclusion with no defining lab test — which is exactly the kind of territory Dr. Wilson has spent his career in. He has written about both several times on this site. This guide gathers those passages in one place: what he says the overlap is, what he suggests a patient do first, what he has seen respond, and what the one published report on the protocol actually measured.

The overlap, as he describes it

The clearest statement is in a short article on three conditions that seem to travel together:

Depression, obesity and fibromyalgia seem to cluster together, and may actually have a common cause–low body temperature due to problems with thyroid hormone.

As for fibromyalgia, with its muscle pain, brain fog and fatigue, low body temperature may contribute in any number of ways, including low energy metabolism in muscles, reduced neurotransmitter production, and constricted blood vessels.

— Depression, obesity and fibromyalgia — Is low body temperature the underlying cause?

On fibromyalgia specifically, he points to a metabolic-rate finding:

Research suggests that people with fibromyalgia have lower resting metabolic rate than people without fibromyalgia. That would lead to lower body temperatures.

— Fibromyalgia and Your Thyroid: What You Need to Know

The CDC’s exclusion rule, read closely

Dr. Wilson’s argument about chronic fatigue syndrome starts from the official criteria rather than against them. Before CFS can be diagnosed, other explanations must be ruled out — and he notes which one heads the list:

The CDC goes on to explain that before a patient is diagnosed with Chronic Fatigue Syndrome, other conditions that may explain the chronic fatigue should be ruled out. And the very first such example that is listed is untreated hypothyroidism. What the CDC means is that patients with symptoms of chronic fatigue might actually be suffering from low thyroid function.

The CDC also says that people can be correctly diagnosed for Chronic Fatigue Syndrome if they have sufficiently treated hypothyroidism. The standard mentioned to document and verify adequate treatment is “normal thyroid-stimulating hormone levels”! That is, normal TSH levels. But we know that many people with normal TSH levels still respond beautifully to T3 therapy for Wilson’s Temperature Syndrome and many are also persistently cured.

— Chronic Fatigue Syndrome

His conclusion follows from the gap between “normal TSH” and “normal thyroid function” — the same gap the whole site is about, and the one the critics reject.

What he asks patients to do first

The same instruction appears in every one of these articles:

That’s why I recommend that anyone with a diagnosis of CFS do one vitally important thing: check your body temperature.

If your body temperature is consistently low (below 98.5 F., or 36.94 C. but typically lower than 97.8 F, or 36.56 C) it means that your metabolism is low. That means your body isn’t producing the amount of energy it should.

— Don’t forget to do this if you have chronic fatigue syndrome

If you have fibromyalagia, I suggest you start taking your body temperature. For the most accurate results, use a liquid metal thermometer, take it three times a day, starting three hours after you wake up, for several days, and average the temperature for each day.

— Fibromyalgia and Your Thyroid: What You Need to Know

The method is on How to Take Your Temperature for a Wilson’s Temperature Syndrome Log.

What he reports seeing

These are his clinical claims, in his words. They are strong, and readers should weigh them against the size of the published record (below):

Many of the patients I see who can normalize their temperatures with T3 are treated adequately with T3, alone or in combination with T4, see a significant dramatic improvement in their symptoms of fibromyalgia. This process usually takes a few weeks to a few months. This includes not just tender points, but fatigue, brain fog, unrestful sleep, irritable bowel syndrome, headaches, decreased memory and/or concentration, chemical sensitivities, and others.

— Fibromyalgia and Your Thyroid: What You Need to Know

Fibromyalgia is a chronic condition, there is thought to be no known cure and sufferers are encouraged to learn to live as well as possible with the pain and other symptoms. However, many patients with Fibromyalgia have been completely cured with the WT3 protocol. Some doctors feel they can help most of their Fibromyalgia patients with this protocol.

— Fibromyalgia

Indeed, many patients diagnosed with Chronic Fatigue Syndrome have responded dramatically well to proper T3 therapy for Wilson’s Temperature Syndrome.

— Chronic Fatigue Syndrome

He also names the other causes he looks for alongside temperature — “Other causes can include adrenal exhaustion and nutritional deficiencies. These, too, affect your thyroid function.” — which is why the adrenal question gets its own guide.

What has actually been published

The protocol’s peer-reviewed footprint is a 2006 report in the Puerto Rico Health Sciences Journal, and its subject was chronic fatigue. Its result, verbatim:

We report the results of 11 patients who underwent the WT3 protocol for the treatment of CFS. All the patients improved in the five symptoms measured. All patients increased their basal temperature. The recovery time varied from 3 weeks to 12 months.

— Friedman, Miranda-Massari & Gonzalez, P R Health Sci J 2006;25(1):23–29, PubMed 16883675

Eleven patients, no control group. That is the whole of it, and this site says so wherever the paper is cited. The “completely cured” language above is Dr. Wilson’s clinical experience, not a trial result.

Where to go from here

This is a reader’s guide compiled from Dr. Wilson’s published writing and one published report; every quotation links to its source. Fibromyalgia and chronic fatigue syndrome have many possible causes; nothing here is a diagnosis or medical advice.