Thyroid Tests

  Reference Range
TSH0.4-4.0 uIU/L
TSH (Thyroid Stimulating Hormone) stimulates production and release of T4 and T3 by the thyroid gland. A low TSH result can indicate hyperthyroidism while a high result can indicate hypothyroidism.
Free T4 0.8-1.9 ng/dL
Free T4 (non-protein bound thyroxine) is produced by the thyroid gland and is a good reflection of thyroid status. Low results indicate hypothyroidism while high results indicate hyperthyroidism.
Free T3 1.5-4.1 pg/mL
Free T3 (non-protein bound triiodothyronine) is produced by the thyroid gland and is a good reflection of thyroid status. Low results indicate hypothyroidism while high results indicate hyperthyroidism.