How high can a TSH level go?
How high can a TSH level go?
Some suggest that TSH levels of over 2.5 milliunits per liter (mU/L) are abnormal, while others consider levels of TSH to be too high only after they have reached 4 to 5 mU/L. Both children and teenagers as well as older people have somewhat higher TSH levels than middle-aged people.
What can cause extremely high TSH?
Causes of High TSH
- 1) Hypothyroidism (Underactive Thyroid) TSH often increases in response to an underactive thyroid gland (primary hypothyroidism) [1].
- 2) Iodine Deficiency or Excess.
- 3) Obesity.
- 4) Radiation Therapy.
- 5) Pituitary Tumors.
- 6) Some Toxins, Drugs, and Supplements.
- 7) Rare Genetic Disorders.
- 8) Aging.
Is TSH 9 too high?
Subclinical hypothyroidism is defined as a thyroid stimulating hormone (TSH) level of 4.6 to 10 mIU/L. A normal TSH level is 0.4 to 4.0 and full-blown hypothyroidism is 10 or higher.
What if your TSH is 40?
Patients who show too much response to TRH (TSH rises greater than 40) may be hypothyroid. This test is also used in cancer patients who are taking thyroid replacement to see if they are on sufficient medication. It is sometimes used to measure if the pituitary gland is functioning.
Is TSH 45 high?
The typical range of reference for TSH levels is anywhere between 0.45 and 4.5 milliunits per liter (mU/L) . A recent study suggests that the normal range should be more like 0.45 to 4.12 mU/L. TSH can vary wildly based on your age, sex, and stage of life.
What is the optimum TSH level?
While most laboratories define a normal TSH as between roughly 0.5 mU/l and 5.0 mU/l, some experts argue that the upper limit of a normal TSH should be lower (around 2.5 mIU/L) due to the fact that the vast majority of young adults without thyroid disease have a TSH value between 0.4 and 2.5 mIU/L.
What do dangerously high TSH levels indicate?
If your TSH levels are abnormally high, it could mean you have an underactive thyroid, or hypothyroidism. That’s because it indicates your pituitary gland is producing more TSH in an effort to stimulate your thyroid to produce thyroid hormone, according to the Mayo Clinic.
What are the reasons for high TSH levels?
Side effect of medication. The journal Medicina says that some types of medication can cause hypothyroidism along with its associated symptoms.
What medications cause elevated TSH levels?
Lithium therapy[21,22,23,24,25].
