What are bad TSH levels?

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 is acceptable TSH level?

TSH normal values are 0.5 to 5.0 mIU/L. Pregnancy, a history of thyroid cancer, history of pituitary gland disease, and older age are some situations when TSH is optimally maintained in different range as guided by an endocrinologist. FT4 normal values are 0.7 to 1.9ng/dL.

Is Low TSH OK?

Patients with TSH levels below 0.1 mIU/L are more likely to have complications due to their SH such as atrial fibrillation, bone loss and conversion to overt hyperthyroidism. Therefore, in certain groups of patients with TSH below 0.1 mIU/L, treatment should be strongly considered.

What happen if TSH is high?

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.

Is TSH 1.77 normal?

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.

What happens if TSH is too low?

Symptoms of low TSH include weight loss, fatigue, confusion, heat intolerance, fast heartbeat, high blood pressure and other symptoms. The endocrine system is responsible for regulating the function of organs in your body.

Is 0.03 TSH too low?

In thyroid replacement therapy for hypothyroidism, the usual therapeutic goal is to achieve a TSH level in the mid-normal range (1 to 2 milli-International Units/L). In thyroid replacement for subclinical hypothyroidism, the usual target TSH level is 0.03 to 3 milli-International Units/L).

What is a dangerously low TSH level?

What does it mean when your TSH levels are low? A low TSH level—below 0.5 mU/l—indicates an overactive thyroid, also known as hyperthyroidism. This means your body is producing an excess amount of thyroid hormone.

Is high TSH good or bad?

If your TSH level is higher than it should be, you may have hypothyroidism. This occurs when the pituitary gland overcompensates for low amounts of thyroid hormone by pumping out more TSH. This condition is most common in older women, but it can occur in any gender at any age.