The question "What is the highest range of thyroid?" is slightly ambiguous, as it could refer to the highest normal range of thyroid-stimulating hormone (TSH) or the level that indicates a potentially problematic high TSH level. This answer will address both interpretations based on the provided reference about TSH ranges.
Here's a breakdown of TSH ranges by age, according to the reference:
TSH Normal and High Ranges by Age
| Age Range | Normal TSH (mU/L) | High TSH (mU/L) |
|---|---|---|
| 18–30 years | 0.5–4.1 | > 4.1 |
| 31–50 years | 0.5–4.1 | > 4.1 |
| 51–70 years | 0.5–4.5 | > 4.5 |
| 71–90 years | 0.4–5.2 | > 5.2 |
Understanding the Data
- Normal TSH Range: The normal range for TSH varies slightly with age. For younger adults (18-50), the normal range peaks at 4.1 mU/L. This peak increases to 4.5 mU/L for people between 51–70 years old, and to 5.2 mU/L for people between 71-90 years old.
- High TSH Range: A TSH level above these age-specific normal ranges are considered high. For example, a TSH greater than 4.1 mU/L would be considered high for someone aged 18-50, while someone older may have a slightly higher high range.
The Highest Normal TSH Range
Based on the provided data, the highest normal TSH range is 0.4-5.2 mU/L for individuals aged 71–90 years.
When is TSH Considered Too High?
According to the referenced article, TSH levels that are higher than those listed above are generally considered high. This would mean a TSH greater than 5.2 mU/L for individuals aged 71-90 years would be considered high. High TSH levels often indicate that the thyroid is underactive. Low TSH levels mean the thyroid may be overactive.
It's important to remember that these are general guidelines. Individual health and circumstances can influence what is considered a normal or problematic TSH level. Always discuss your test results with a healthcare professional.
