What Is A Normal Tsh Level?

What Is A Normal Tsh Level?

A TSH test measures the amount of thyroid-stimulating hormone in your bloodstream. Thyroid-stimulating hormone is produced by the pituitary gland, and its work is to regulate the amount of hormones your thyroid gland releases. The thyroid itself is responsible for controlling various body functions such as growth and metabolism.

The pituitary gland and thyroid gland work hand in hand to ensure the right amount of thyroid hormones is produced. But if this working relationship is disrupted, then the thyroid either produces lesser or too many hormones.

The Importance of a TSH Test

Your health practitioner may recommend a TSH Blood Test if you’re having issues with your thyroid gland. Problems with the thyroid can be categorized as either hyperthyroidism or hypothyroidism. Hypothyroidism is the condition where this gland produces fewer than necessary hormones, which causes slowing down of metabolism. A person with this condition feels weak, fatigued, and has difficulty concentrating. It can be caused by Hashimoto’s disease, iodine deficiency, thyroiditis, postpartum thyroiditis, etc.


On the other hand, hyperthyroidism is where the thyroid gland produces more than the required hormones. This causes the body’s metabolism to speed up. Its symptoms are anxiety, increased appetite, and trouble sleeping. It is caused by Graves’ diseases, excessive amounts of iodine in the body, etc. A TSH test is done by drawing a sample of blood, which then goes through analysis.

What is a normal TSH level?

The normal TSH level range is 0.4 to 4.0 mU/l. If the level is higher than this, then it shows your thyroid is producing fewer than needed hormones, and thus, it’s underactive. You may have hypothyroidism. If the thyroid is not producing an adequate amount of hormones, then more TSH is released by the pituitary gland for stimulation.


If the TSH level is below the normal range, then the thyroid is overactive, and it’s producing more than the needed amount of hormones. It indicates you may have hyperthyroidism. Too many hormones mean less TSH.These are some of the things you need to know about TSH, TSH tests, and knowing whether your level is normal. Note that your doctor may conduct extra tests to confirm his/her diagnosis.