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What is the usual normal range for TSH levels?

3 doctors weighed in
Dr. Susan Wingo
Internal Medicine - Endocrinology
2 doctors agree

In brief: 0.5 - 5.0

In general, people with no known thyroid conditions will have TSH values between 0.
5 and 5.0. Each lab determines its own normal range, and the lower limit can range from 0.2 - 0.6, and the upper limit from 2.5 to 6.0. There are some doctors who feel that the upper limit of normal is too high and that treatment should be considered for anyone with symptoms and TSH over 2.5 to 3.0.

In brief: 0.5 - 5.0

In general, people with no known thyroid conditions will have TSH values between 0.
5 and 5.0. Each lab determines its own normal range, and the lower limit can range from 0.2 - 0.6, and the upper limit from 2.5 to 6.0. There are some doctors who feel that the upper limit of normal is too high and that treatment should be considered for anyone with symptoms and TSH over 2.5 to 3.0.
Dr. Susan Wingo
Dr. Susan Wingo
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