Viktoriia

clenbuterol upregulates fatty acid metabolism. through this process your bodies core temperature will increase.. however your body does not know that its core temperature is being artificially elevated because of an exogenous drug (the Clen ).. so what it does in an attempt to counter H10 this and reach a state of homeostasis, it begins to down regulate the conversion of T4 into T3 in the liver.

so now your metabolism begins to slow down and your T3 levels drop off.. not good for fat loss or energy H10.

so , the solution is to simply take T3. generally at just above maiantence dose.. like 25mcg.
this is going to allow the Clen to do its job and increase fatty acid metabolism, allow your core body temp to increase and burn through calories, AND allow your metabolism to run at a fixed rate (rather then dropping off).

so this is what I have most all female clients who are dieting do .. 40mcg clen, 25mcg T3, 15mg Var.. thats a pretty standard starting point.

NOW I will also use T4 on various occasions as well . but again, for the scenario above, T3 works much better.. because the Clen is blunting the conversion of T4 into T3, its not blunting the production of TSH.
I like T4 for more maintenance or even bulking scenarios. but not for cutting with Clenbuterol.

T4 is going to provide more ‘anabolic ‘ properties then T3.. thats because when T4 is converted into T3, there is an enzymatic byproduct of this conversion, and that enzyme has anabolic properties.
whereas T3 is just the final product and provides energy metabolism , its not anabolic at all. in fact, it can be catabolic (mainly if estrogen levels are low).

so for cutting or contest prep, clen and T3..
for off season maintenance, T4 is the better option