Why Fatigue Matters in Thyroid Disease

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The notion that unremitting fatigue is a core clinical symptom is difficult for many physicians and patients to reconcile with its ubiquitous nature in illness. Here is yet another example of the importance of recognizing fatigue and the constellation of other clinical signs that manifest concurrently in thyroid disease. Here we see that fatigue represents a loss of mitochondrial function that, if left untreated, has some subtle and not so subtle effects on central nervous system functioning.

Some Background: Fatigue and the Mitochondrial Connection

Fatigue is one of the most common signs of mitochondrial dysfunction or deficit. Mitochondria, the energy factories within our cells, produce the ATP or cellular energy, that our bodies require to function. This process is called oxidative metabolism. As Dr. Lonsdale wrote about in How can Something as Simple as Thiamine Cause So Many Problems, consider each mitochondrion as a mini, combustion engine.

 Fuel + Oxygen + Catalyst = Energy

 Each of our one hundred trillion body/brain cells is kept alive and functioning because of this reaction. It all takes place in micro “fireplaces” known as mitochondria. Oxygen combines with fuel (food) to cause burning or the combustion – think fuel combustion engine. We need fuel, or gasoline, to burn and spark plugs to ignite in order for the engines to run.

In our body/brain cells it is called oxidation. The catalysts are the naturally occurring chemicals we call vitamins (vital to life). Like a spark plug, they “ignite” the food (fuel). Absence of ANY of the three components spells death.

Antioxidants like vitamin C protect us from the predictable “sparks” (as a normal effect of combustion) known as “oxidative stress”.  Vitamin B1, is the spark plug, the catalyst for these reactions.

 

When there is dysfunction within this pathway, which is also called the OXPHOS or oxidative phosphorylation, when the engine doesn’t get the fuel it needs or the spark plugs don’t work, fatigue and other symptoms arise. Fatigue is an important clinical sign that something is amiss in our cellular combustion engines.

Mitochondria and Hypothyroidism – Beyond One Test One Drug

In chronic hypothyroidism, chronic mitochondrial deficits are clinical signs that can be recognized, if one is looking for them. They present as fatigue, and when chronic, as balance and gait disorders. Recall our discussion and videos on Hashimoto’s disease associated with walking and balance difficulties: Adverse Reactions, Hashimoto’s Thyroiditis, Gait Balance and Tremors –  those examples pointed to mitochondrial dysfunction. Here is yet another example of the importance of recognizing subtle clinical signs of mitochondrial damage.

Watch and listen for the clinical signs. How many do you have?

Notice, he speaks of the importance of proper nutrition, of reducing inflammation, and of exercise and other modalities to correct the functional deficits of hypothyroidism and mitochondrial dysfunction. Notice also, the improvement in functioning after only eight weeks of treatment.

Datis Kharrazian: Developing the Clinical Eye to Discover the Causes of Fatigue from The Institute for Functional Med on Vimeo.

If you or a loved one suffers from chronic and unremitting fatigue rule out thyroid dysfunction and its sister condition mitochondrial damage. A simple TSH test, as is commonly considered, is not sufficient to find thyroid dysfunction. A full panel must given. Once a diagnosis is reached, remember thyroid medications, though they may be necessary, are not enough to correct mitochondrial damage. Diet and nutrients must considered. Put it all together and live healthier.

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This article was published originally on Hormones Matter on November 7, 2013. 

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