What is the normal level of hormons T4, T3 & TSH in a healthy person?
The thyroid gland, located in the lower front of the neck, produces hormones - thyroxine (T4) and tri-iodothyronine (T3) - that are extremely important for the regulation of the body's metabolism.
User Comments
- Med Lab Tech - I perform the tests.
- Normal values of the thyroid hormone level vary with specific age groups. The normal value for TSH is: Adult, 2-10 microunits/milliliter or Newborn 3-18 microunits/milliliter. The other tests are broken down according to age. Also may vary a little with each laboratory.
- Source:
Clinical Chemistry Principles, Procedures, Correlations by
Michael L. Bishop, Edward P. Fody and Larry E. Schoeff
Normal ranges for:
T4: 4.5-13 ug/dL or 58-167 nmol/L
T3: Not included. Sorry.
TSH 0.5-5.0 uU/mL:
Normal ranges vary slightly from lab to lab, but are very close to these one. I can get the normal range for T3 Tuesday morning. If you are willing to wait. (next time I work)
- T4 - 1.7 to 4.7 ug/L
T3 - 1.5 to 3.5 ug/L
TSH - up to 55 ug/L
- TSH normal range is 0.3-5.0 (The higher the number, the more likely you are to have hypothyroid. The average for a healthy thyroid is 2. You can have a 3 and still have hypothyroid, despite being within normal range)
I'm not certain about the T3 and T4 ranges.
- My question is related with hypothyroidism.
- T4= 5.7 - 11.7 ug/dl
T3= 100-200 ng/dl
TSH = 0.5 - 4.6 uIU/ml