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Thyroid Cancer, Nodules & Hyperthyroidism (Expert Forum)
Suppressed T3
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.
Suppressed T3
by HappilyRetired, Jul 30, 2009 01:37PM
I am overweight and have been able to lose only by seriously restricting calories (which my endo agrees is necessary). I have lost 30 lbs since the first of January. My January T3 was near the top of the range, but now it's only at the half-way point in the range--and I'm stalled in my weight loss for the past month. I take Cytomel (5 mcg twice a day). I think the low calories have suppressed my T3, but if I raise calories, I'll gain. Is there any way to raise my T3 other than increasing dosage of Cytomel? (I also take 75 mcg of Levoxyl). I have Hashimoto's.
Doctor's Answer
by Mark Lupo, M.D., Jul 31, 2009 06:30AM
, Jul 31, 2009 06:30AM
The weight gain is not likely due to the thyroid. Assuming the levoxyl and cytomel regimen is keeping TSH in the target range (0.5-2.5) there is little impact on metabolism. T3 levels depend on the timing of the cytomel dose in your case --- tough to rely on. It is common to see a weight plateau after about 10-15% of initial total body weight is lost (which I assume 30 pounds reflects about that range). Exercise is key at this time and continuing with small frequent low calorie meals (total 800-1200 / day depending on the situation).
