I absolutely know it’s different for everyone and I imagine it also depends on how high TSH is so I know it will be only a rough idea
This was his NHS result from October (no FT3) and he started levo about 5 days ago. He also has a Randox report with similar numbers
Very long story but over the last few years it’s varied from 5.5 to 9 something but he’s remained reluctant to start. He’s finally been persuaded that it’s very unlikely to decline without replacement
Thanks