Triiodothyronine (T3) Free is one of the main thyroid hormones and is important for regulating metabolism. High or low levels of T3 Free can indicate thyroid dysfunction.

iollo markers that associate with Triiodothyronine (T3) Free


Thyroid hormones like T3 stimulate alanine release from muscle and increase circulating alanine levels.

Lactic acid

T3 increases metabolic rate and glucose utilization, which can lead to increased lactic acid production.


Phenylalanine can be converted to tyrosine, which is needed for T3 synthesis. High phenylalanine levels may increase T3.


Tryptophan is involved in regulating TSH release from the pituitary gland, which stimulates T3 production by the thyroid.


Tyrosine is required for the synthesis of thyroid hormones including T3. Increased tyrosine availability can increase T3 production.