I know :) I was trying to get your opinion on the short, intense effect on T3 levels resulting from giving a pure T3 supplement, as compared to the sustained effect of T4 or a T3/T4 combo, in the context of sleeping following a stressful situation. It sounds like you think the combination supplement is more appropriate.T4 has no effect on treating hypothyroidism. It needs to be converted to T3 in order to actually have a positive effect. If T4 was working just fine then all the people on Synthroid would be ecstatic and Armor, Cynoplus, Cytomel would not exist. Taking just T4, if you are truly hypothyroid, is almost guaranteed to convert into enough rT3 to block the thyroid "receptor" and increase hypo symptoms even more. The role of T4 is to buffer the T3 and serve as reservoir of T3 that will slowly get converted in the liver from the T4 over the period of a few hours. Hence the recommendation from Peat to use pure T3 during the day and T4/T3 combo during the night. T3 will have to be dosed a lot more often but that is OK during the day. At night, you need that T4 to serve as reservoir for T3 conversion when needed. Also, T4 seems to prevent the heart palpitations some people get from higher dose pure T3.
Regarding my concern about supplementing T4: I was wondering if it wouldn't be better for a euthyroid subject to rely on their endogenous production once the stress had been suppressed by the T3, rather than on exogenous T4 which could raise rT3.