I have done a little experiment. Subtracted ten and added ten percent to the standard parameters and “surprisingly” it gave the following pattern:
![](https://www.glensbo.dk/circle/wp-content/uploads/2021/04/Skaermbillede-2021-04-14-kl.-07.42.57-1024x820.png)
What is obvious from this chart is that there are opposite effects of the parameters on the TSH and the thyroid hormones:
![](https://www.glensbo.dk/circle/wp-content/uploads/2021/04/Skaermbillede-2021-04-14-kl.-09.26.59-1024x588.png)
In FT3 there are effects above the ten percent (16% above and 13% below)