H this may be a question for Rod.
My normal dose to have a correct TSH is 100 Mcr of NHS T4. What very roughly would that be in T3 terms. At present I am taking 22.7 of t3 twice a day but have just cut down to 15 Mcr of sustained release t3 :twice a day.
My maths tells me that t3 is 5 time more potent that t4. 15 x 5 = 75 MCR of T4? does that mean if I am taking that twice a day I am taking 150 of the equal amount of T4. Or does it mean I am only taking the equal amount of 75Mcr T4 and because T3 only has a very short half life the second dose is just filling my body with 75 MCR of equal T4. This is vey rough maths.