what are the tsh levels?
449747
TSH levels typically fall between 0.4 and 4.0 milliunits per liter (mU/L), according to the American Thyroid Association. Ranges between laboratories will vary with the upper limit being between 4 to 5. If your level is higher than this, chances are you have an underactive thyroid.
808995
High TSH levels indicate hypothyroidism. fatigue. weight gain. swelling of the face and neck. increased sensitivity to cold temperatures.
1438672
The term “borderline hypothyroidism” typically is used when blood tests show that your body's level of TSH is slightly above normal, but your T3 and T4 levels are normal. Another name for this condition is subclinical hypothyroidism.
1232764
Most patients with thyroid cancer will have normal TSH levels. Blood samples will also be checked for T3 & T4 (the metabolism-controlling hormones) and calcitonin (the calcium-controlling hormone). Most thyroid cancers will have normal T3 and T4 levels. High calcitonin levels are often seen in medullary thyroid cancer.
632524
Lower-than-normal T4 levels usually mean you have hypothyroidism. However, some people may have increased TSH levels while having normal T4 levels. This is called subclinical (mild) hypothyroidism. It is believed to be an early stage of hypothyroidism.
488947
Low TSH levels can mean your thyroid is making too much of the hormones, a condition called hyperthyroidism. A TSH test does not explain why TSH levels are too high or too low.
1013390
TSH Reference Intervals. ... Serum TSH levels exhibit a diurnal variation with the peak occurring during the night and the nadir, which approximates to 50% of the peak value, occurring between 1000 and 1600 hours.
136277
Low TSH levels indicate hyperthyroidism. This is also known as an overactive thyroid. If the thyroid gland is secreting levels of hormones that are too high, the pituitary gland produces less TSH. Symptoms of hyperthyroidism include: an irregular or rapid heartbeat.
422830
THYROID STIMULATING HORMONE (TSH) Assessment of TSH is the single most useful test of thyroid function in the vast majority of patients. Primary care providers should seldom need to order any other biochemical thyroid test. In most cases the TSH will be within the normal range, and no further testing is indicated.
1249479
A normal range for TSH in most laboratories is 0.4 milliunits per liter (mU/L) to 4.0 mU/L. If your TSH is higher than 4.0 mU/L on repeat tests, you probably have hypothyroidism. Your doctor may also order a T4 test. Most of the T4 in your blood attaches to a protein, and when it does, it can't get into your cells.
1042531
Higher levels suggest hypothyroidism, or an underactive thyroid, while lower levels indicate hyperthyroidism, or an overactive thyroid. When TSH and thyroid hormones are out of balance, this can cause a range of issues relating to the muscles, breathing, body temperature, and more.
348483
Today's TSH tests are very accurate and sensitive; they can help diagnose even the mildest cases of hypothyroidism. It's important to understand that just because your TSH test comes back normal, it does not rule out the possibility of you being hypothyroid.
225436
What do low levels mean? Low TSH levels indicate hyperthyroidism. This is also known as an overactive thyroid. If the thyroid gland is secreting levels of hormones that are too high, the pituitary gland produces less TSH.
48946
Studies have shown that early morning fasting causes higher TSH levels compared to tests taken in the afternoon on patients that did not fast. Since fasting affect TSH levels, fasting might make it difficult to diagnose subclinical hypothyroidism, as the condition is diagnosed by specifically looking at TSH levels.
1472675
Thyroid levels and TSH, in particular, can change along with the seasons. 11﻿ TSH naturally rises somewhat during colder months and drops back down in the warmest months. Some doctors adjust for this by prescribing slightly increased dosages during colder months and reducing dosage during warm periods.
456791
Adequate therapy usually results in normal TSH and T4 levels after 2 to 3 weeks of therapy. Readjustment of thyroid hormone dosage should be made within the first four weeks of therapy, after proper clinical and laboratory evaluations, including serum levels of T4, bound and free, and TSH.
870809
Fasting. This fasting/non-fasting variation can be especially problematic if you have subclinical hypothyroidism, defined by a mildly elevated TSH and normal free T4. The diagnosis and monitoring of this condition relies solely on the TSH value since the T4 and T3 levels are typically normal.