Re: Started on the lev...T3 half-life

[Guest guest]

Thanks for your reply. It was certainly helpful. Happy Holidays!

Dee

[Guest guest]

Dee,

First 4 days isn't long enough for the residual Armour to be out of

your system. Believe I have seen posts siting two weeks which would

track with my own experience.

I posted this question on T3 half life on several sites a while

back. I too had gotten conflicting information about 3 hours versus

longer. Here is a response from one of them that I know to be a

reputable researcher and engineer. Thought you may find it helpful.

Read on for the post:

" I've seen data about the half-life of T3 listed from 1.8 to

2.5 days

(http://www.rxlist.com/cgi/generic3/liothyronine_cp.htm.)

This means every two days there is half the amount of T3.

Suppose a person takes 25 mcg of T3 (and take no more.) In

two days it would be like taking 12.5 mcg, in four days

6.25 mcg and on and on. T4 has about a six day half-life.

There is a difference however, the body (liver and

kidneys) must convert T4 to T3. This takes time, and this

is one of the reasons a person cannot tweek their dose

using T4. It takes for the change in T4 to settle down. In

addition, some T4 is converted to RT3, which at best is

inert and is also a slowing agent. Large amounts of RT3

can make a person hypothyroid even when the TSH is low.

(Some of us have conversion problems and do not make enough

T3 and way too much RT3. Also see 's protocol.)

T3 on the other hand is ready to go. Within hours the

metabolism is raised and will continue for the rest of the

day. By the end of two to four days the big bang is over

and a person needs more. I believe people need T4 and T3

alone will cause ups and downs. This is one reason Armour

is so good. I use extra T3 +/- 5mcg for tweeking and this

is based on body temperature and pulse rate.

T3/Cytomel when taken as directed is mostly safe, a large dose all at

once could put a person on the floor rather permanently. Many

starting Armour or T3 will experience heart flutter when

first starting out. This is why one has to gradually work

up the dose. Here is one reason. Suppose a person is

taking T4 and producing an amount of T3 from it. Now this

person takes T3. Well a person is still producing T3 from

the T4 and now also has a big shot of T3 from the Armour.

That's too much T3 and is guaranteed to make a person fell

heart flutter. A better way is to gradually increase the

dose over a few weeks. "

> Hi! I started both at the same time. I was on Armour before,

nothing for four

> days, and then I started the combo of Levoxyl/Cytomel. I'm not

having any

> hyper symptoms such as heart palps or sweating. My pulse is 64.

Even though my

> body temp was up a degree this morning I still put my sweater on

and everyone

> else in the house is dressed lightly and comfortable. Maybe I

should just wait a

> few days or a week on this combo and see how I feel then. I thought

t3 had a

> short half life so I thought it would be out of my system by

bedtime. I was

> once on cytomel only at 75mcg and don't remember having sleeping

problems. The

> day before I hadn't had any med and had the same problem sleeping

that night so

> maybe it's just a hypo problem I'm experiencing? Thanks for your

help.

> Dee

>

>

>