From time to time a thyroid patient may ask whether slow release T3 or standard T3 (pure T3) should be used for T3 replacement. Slow-release T3 is sometimes referred to as sustained-release T3.
There are really two parts to this question: 1) is standard T3 or slow-release T3 best in general for T3 replacement and 2) which is best for the circadian T3 method (CT3M)?
Let me answer this by dealing with the general use of T3 separately from that of CT3M.
General use of T3