A member asked:

Does t4 and tsh levels fluctuate? my t4 free is 1.0 (0.9-1.8ng/dl) and tsh is 0.88 (0.35-5.5) 1 month ago they were t4, 1.4 and tsh, 1.06

2 doctors weighed in across 2 answers

Yes: There are a number of reasons for small variations, 1. Biologic variation in a person, 2, Variation due to changes in diet, weather, medication etc, 3. Variation in the performance of the analyzes used for testing. The variation you mentioned is not meaningful. Wish you good health and a Happy Thanksgiving!

Answered 11/24/2016

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They will fluctuate.: The thyroid gland responds to whatever may be going on physiologically in the body, and as such these numbers may vary a bit day to day, or even hour to hour. As long as these variations are within the limits of normal, then you're likely to be OK.

Answered 11/24/2016

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