T3 Uptake

Also known as T3 resin uptake. Measures the number of unbound sites on the thyroid binding proteins. Levels are used to identify thyroid states (hypo and hyper) as well as selenium and iodine sufficiency. Can also be used to identify how much binding globulins are available to bind to thyroid hormones.

Available Tests

FDX 00


Full Biomarkers +
FDX 22


Full Biomarkers +

Patient Test Info Sheet

Example Snapshot Report

The FDX Method

Find a Blood Draw

Additional Resources