**NOTE: All laboratory testing requires an authorizing physician. DHA Laboratory offers a patient direct program that partners you with an authorizing physician. If you have any additional questions regarding the availability of testing, please contact our laboratory by telephone or email.**
T3 Uptake is used in the evaluation of thyroid function. It is also used in the diagnosis of hypothyroidism and hyperthyroidism. It can be used as an indirect measure of thyroxine binding proteins in plasma as well.