
1. Levothyroxine gives you T4. The hormone that works inside your cells is T3.
The seven in the morning pill, the one you take fasted before you touch the coffee, is thyroxine. T4. A reserve hormone that circulates in your blood and waits.
The one that actually enters your cells and orders them to make energy is a different one: T3. It is three to four times more active.
Between the two there is one step.
You have taken that pill every morning for years. Not once has anyone looked at that step.



