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Thyroid Cancer, Nodules & Hyperthyroidism (Expert Forum)
Changing TSH Levels
Answered by
Mark Lupo, M.D. - Thyroid Nodules, Thyroid Cancer, hyperthyroidism, hypothyroidism, Thyroid Ultrasound
Thyroid & Endocrine Center of Florida
Sarasota - FL
Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.
Changing TSH Levels
by nalh, Dec 10, 2005 12:00AM
Hi,
Besides any sort of medication, can you please tell me what can cause changes in TSH levels? Within the past few years, I'm mainly in the upper 3s, but last Sept I was low (.2), and I am now higher (7.85). Is it a big change to go from 3.7 to 7.85 from Aug to Nov? I'm testing negative for antibodies and started on synthroid a couple of weeks ago (50). Thanks.
Besides any sort of medication, can you please tell me what can cause changes in TSH levels? Within the past few years, I'm mainly in the upper 3s, but last Sept I was low (.2), and I am now higher (7.85). Is it a big change to go from 3.7 to 7.85 from Aug to Nov? I'm testing negative for antibodies and started on synthroid a couple of weeks ago (50). Thanks.
Doctor's Answer
by Mark Lupo, M.D., Dec 11, 2005 12:00AM
, Dec 11, 2005 12:00AM
High soy diets can inhibit thyroid function and increase TSH. Also significant illness can alter TSH. My guess is that you have antibody negative Hashimotos -- an ultrasound would show subtle changes. The synthroid sounds appropriate. The only non-consistent data point is the 0.2 TSH level in 9/04 -- as long as you are followed closely it should be fine.
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The soy may aggravate a problem even if its not there -- but I tend to agree this is usually seen in patients with underlying thyroid disease.
I don't think additional testing is necessary except an ultrasound could be considered to look at anatomy of the thyroid.
Thanks again.