Is it possible that iron deficiency can mimic hyperthyroid symptoms? Or can it cause hyperthyroidism that hasn't show up on TSH and T4 tests? I have typical hyperthyroid symptoms, the worst being generalized hair loss and excessive sweating (both started concurrently), but have had my doctor tell me that I do not have a thyroid disorder. These are my test results:
Ferritin 39 ng/mL
Iron 63 mg/dL
total iron binding capacity 388 ug/dL
Iron/total iron binding capacity 16%
Free T4 1.20 ng/dL
TSH 2.66 uIU/mL
I clearly have low levels of ferritin, iron, total iron binding capacity, and iron/irion total iron binding capacity. Would this alone be responsible for my symptoms? I became a vegetarian that ate very little iron-rich foods for about 2 years, which is when I noticed my symptoms--can iron deficiency cause hyperthyroidism, or is it vice versa? Can other nutritional deficiencies cause my thyroid disorder-like symptoms (heat intolerance, frequent bowel movements, sweating, general hair loss, memory problems)?
Thyroid levels look fine overall.
Thyroid symptoms are very nonspecific, so could be one of many other causes.
If low ferritin, iron AND TIBC -- suggests anemia of chronic disease (Ie, another illness causing it - but not thyroid in this case) -- would talk to your doctor about why you would have this pattern.
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