-T3 is stored in large quantities and released slowly and steadily, which is why it rebounds so quickly. It is very much *unlike* the testes and Leydig cells that produce testosterone in this way.
-Cytomel, pharmaceutical T3, has a loonngg half life; something like 27 hours. It's not a quick fix drug. It's excellent for replacement because stable blood concentrations are easy to maintain, but it will not bump you up into a calorie wasting mode for the course of a meal. It doesn't work that way.
The T3 that is sold for research may have a different half life. I have no idea.
Trimax has a shorter half life, but for other complicated reasons isn't a wise choice for a gluttony aid either.
In my opinion, outside of supps used to dispose of glucose or sensitize insulin (which are mild in effect and arguably a waste of time and money), there is no magic bullet for allowing true gluttony. It's well established that one cheat meal per week can actually help a diet, but much more than that makes the diet null and zoid of progress. This is my realization anyways.