The prime reason for calculations like the Jostel TSH Index it to help identify where test results fall within the standard ranges (reference intervals) for TSH and Free T4 - but when considered together, they actually indicate a problem. For example, low TSH and low Free T4 is an odd combination and suggests that the pituitary might not be producing the amount of TSH that would be expected for that Free T4 level - enough to increase thyroid hormone output (if the thyroid is able to do so).
The Jostel TSH Index is discussed - along with much else - in this paper by Johannes W Dietrich, et al:
TSH and Thyrotropic Agonists: Key Actors in Thyroid Homeostasis
Johannes W. Dietrich, Gabi Landgrafe, Elisavet H. Fotiadou
https://onlinelibrary.wiley.com/doi/10.1155/2012/351864
The Wiki page is also potentially worth a look:
Jostel's TSH index
https://en.wikipedia.org/wiki/Jostel%27s_TSH_index
A simple spreadsheet for calculating the Jostel TSH Index
This is an Excel spreadsheet for calculating the Jostel TSH Index - but is likely to work in other spreadsheet software.
From Dropbox:
📄 https://www.dropbox.com/s/qhblibx5vnrw5ec/helvella%20-%20Jostel%20Index%20Calculator.xlsx?dl=1
If you wish to link to this page on HealthUnlocked, copy the entire dark red text below and paste into a post or reply.
[i][b]helvella - Jostel Index Calculator[/b]
A simple spreadsheet for calculating the Jostel Index.
Last updated 10/01/2025[/i]
Link to blog:
https://helvella.blogspot.com/p/helvella-jostel-index-calculator.html
If you find anything incorrect, misleading, typos, links
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