hey Juicin - i think you are right about 100 = replacement. i guess my question would be if i take 50 mcg does it shut down the thyroid like test does to your balls? of do i still have what i normally produce plus the bonus 50mcg?
i would def like to loose more bf so if tis will help - I'm all over it - i just don't want to fuk up my thyroid. Also i would imagine that i would cycle the T$ for 4-6 weeks on ; 4 weeks off, etc.?
I'm not an expert on thyroid meds, so maybe someone else can chime in here, but ill do my best to answer your question.
From what i understand the thyroid is much quicker to recover then something like an HPTA axis. I'm under the belief that you could supress your thyroid with hormones and in that same day, go back to producing whatever you should be in terms of TSH, T4, T3. This, of course assumes that you did not do anything crazy, and/or abuse thyroid meds and havent done any damage to your thyroid in the past.
I would ASSUME that at a low dose like 50 mcg of T4, you would be "supplementing" your bodies own production, and not necessarily shutting it down. However, T4 does have a longer half life than T3, T4 is around 5-7 days i believe while T3 half life is closer to 1-2 days. Does this mean more suppression? I dont know.
As im sure you know T4 is inactive until converted to T3. From what I gather, if you have a sufficient thryroid, it will not convert more T4 to T3 if you supplement with T4. If i were you i'd look into the more powerful hormone of the two - T3.
Anyone feel free to correct me if i'm wrong on any of the above, i'd hate to be giving out false information.