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what is the half life of t3?

raybravo

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10 hrs .
 

raybravo

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Mr_Magoo

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def. seems way off to me, i cant really woute anything off the top of my head but id say trust me and stick witha 2 -3 day half life although ive seen it as a 5 day half life but never n ething less then 48 hrs
 

raybravo

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well , till u prove the link i posted wrong , i'm sticking to what i know bro :)
 

Mr_Magoo

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anybody wanna back me up here as i know t3 has a long half life
 

Severed Ties

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Our pharmacy book says 48 hours with an active life of up to 5 days. t-3 should be taken once a day, preferably an hour before breakfast.


Thats the info from the pharmacy I work at, from my own experience I find for fat loss it's better to divide the dose throughout the day.


ST
 

Bobo Daklown

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your pharmacist is WAY wrong. The half life of T3 is measured in hours (like 3/4 max). You will find about a billion cites in medline. T4 on the other hand is a few days.
 

Severed Ties

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Bobo Daklown said:
your pharmacist is WAY wrong. The half life of T3 is measured in hours (like 3/4 max). You will find about a billion cites in medline. T4 on the other hand is a few days.

Had I asked a pharmacist you might be right, notice I refered to our well supported, hard copy, reference book.

Also if t-3 were only active a few ours it would be necessary to take multiple doses, however it is perscribed only once a day.


ST
 

Bobo Daklown

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You did say the book ..... but I don't care if its the pdr, I still say its still wrong. In fact the primary reason why T4 is rx'd instead of T3 is precisely because you need to dose T3 throughout the day to maintain steady blood levels. As a result, T3 is in fact actually dosed *multiple* times a day. Don't take my word for it...go the thyroid usenet group, they'll give you an earful. As most any hypothyroid patient who supplements with cytomel or armour will tell you. See eg http://jcem.endojournals.org/cgi/content/full/82/3/765 which I just happened to have open. If you look at medline you will find many other articles referring to this rapid elimination. See eg http://www.ncbi.nlm.nih.gov/entrez/...e&db=PubMed&list_uids=11786691&dopt=Abstract. The very rapid onset of T3 and absorption within hours is really very well known.
 
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MikeS

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I remember that Ravers extensive studies on T3 stated the 1/2 life was several days also.
 

Mr_Magoo

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hoping instynct will respond as i bet he knows it well, and that it is days
 

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