Q: Hello,
I have a question which does not seem to have been asked on the forum before. Can anyone give me reasons WHY a TSH can be suppressed OTHER THAN BY ELEVATED THYROID HORMONES? There simply has to be other reasons why it would be suppressed as you’ll understand in reading on.
I've done thousands of panels using TSH along with Free T4 and Free T3 (many times I include Reverse T3 and antibodies). Many times the TSH is becomes significantly suppressed as I try to raise my patients FT4 and FT3 into the normal range. They feel better with adequate FT4 and FT3 yet their TSH is now very suppressed. The problem is that when they see another practitioner and the practitioner becomes alarmed at the low TSH, my patients become scared, go along with the other provider in lowering their dose and then come back to me weeks later feeling bad again (with low thyroid symptoms).
My observation is that if we only use TSH as a test of thyroid function, we are missing about 30% of the population who have some form of actual thyroid hormone disorder (meaning abnormal FT4, FT3, RT3 and/or antibodies). I could have written the reply by Dr. Manzanero abou TSH not being the test of choice in monitoring thyroid function. Therefore, please, please, can anyone shed light as to other reasons for why some people’s TSH suppresses so very easily when simply raising their levels into the normal range?
Carolyn R. Walker, MSN, ARNP
Family Nurse Practitioner
Owner, Prevention & Healing of Iowa
http://www.preventioniowa.com