will using T3 suppress my thyroid?

**Jumbo18** · 04-02-2009, 05:42 PM

so i was thinking of using T3 sometime for fatloss, however will taking a highdose of T3 on a cycle suppress my own thyroid function? may someone please enlighten me, never used T3 before?

**HOLLYWOOD.JACK** · 04-02-2009, 06:15 PM

http://www.steroid.com/Cytomel.php

**Probably** · 04-02-2009, 07:39 PM

Yes it will.
higher than 12.5 mcg will suppress ur thyroid function.. find a good guide about how to cycle it if u still gonna use.

**Jumbo18** · 04-02-2009, 08:39 PM

how much is 75mcg of T4 converted into T3? will 75 mcg of T4 (thyroxine) suppress thyroid? and will i see any benefits from using that much?

**Probably** · 04-02-2009, 08:43 PM

i dont really know, T4 is weaker than T3 .. But anyway, why u worried? if u worried about ur thyroid function then do not take it at all, if u wanna take it, search it up, read up, and educate yourself,and do a nice cycle and tapper down so ur thyroid return to normal .. this will give u real fat loss ?

**Ronnie Rowland** · 04-03-2009, 07:28 PM

Originally Posted by Jumbo18

how much is 75mcg of T4 converted into T3? will 75 mcg of T4 (thyroxine) suppress thyroid? and will i see any benefits from using that much?

My experience with clients using t-3/t-4 combos has been this- "act as if though the pill contains no t-4 (only T-3)." The T4 seems to do little to nothing in regards to helping increase t-3 levels when mixed with t-3. My advise to you is stick to straight t-3!

**M302_Imola** · 04-03-2009, 08:30 AM

Originally Posted by Probably

Yes it will.
higher than 12.5 mcg will suppress ur thyroid function.. find a good guide about how to cycle it if u still gonna use.

I am under the impression that even a dose of 12.5mcg exogenous t3 will shut down your natural endogenous t3 production eventually. That's not to say that your thryroid won't begin production again once the exogenous t3 supplementation is stopped.

To the OP, I don't think your thyroid will be permanently shut down as long as you keep the dose and duration reasonable. Start with 12.5mcg and increase up to 50mcg (I personally wouldn't go past this point, in fear of my thyroid). Oh, I hope you are plan on running test with t3, if not say goodbye to your hard earned muscle.

**xxxJUICExxx** · 04-04-2009, 05:40 AM

On the brighter side, and of special note to dieters, administration of T3 has been shown to upregulate the beta 2 receptors in fat tissue. As you know clenbuterol and similar compounds downregulate this receptor, so using T3 with your clen will help stave off or reverse this downregulation. (1)(2)(3)(4). I would still recommend taking your benadryl every third week, though.

(quoted from the link above)

kinda confused about this here...

they work well individually but negate eachother when combined?