THYROXINE (T4), FREE, DIALYSIS/MASS SPECTROMETRY (SDL12503)
https://www.scanlabglobal.com/shop/sdl12503-thyroxine-t4-free-dialysis-mass-spectrometry-sdl12503-7708
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Measures free T4 by dialysis/MS for accurate thyroid function. Low levels confirm hypothyroidism, guiding levothyroxine dosing.
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