Medscape: CFS linked to low T3 syndrome (by Miriam Tucker)

Chronic Fatigue Syndrome Linked to Low T3 Syndrome

Some people with the condition known as chronic fatigue syndrome (CFS) have low circulating levels of the thyroid hormone triiodothyronine (T3) and normal levels of thyroid-stimulating hormone (TSH), new research shows. The results suggest these patients may be in a hypometabolic state, but one expert thinks the low levels are more likely a consequence, rather than a cause, of CFS.

 

Probably a subtle difference between low T3 syndrome and low T3 state.

 

That's me - low T3, normal THS. Because it is likely a consequence rather than a cause, my doctor will give me only a small dose (3 x 5 mg) of supplemental T3. Initially it was only 2, but I managed to talk her into 3. It helps a little.

 

This is interesting. My T3 is just at the lowest point of normal, but T4 and TSH are normal. My TSH is even pretty low.