what is the difference between T3 and T4

[noworries_247]

I have read a lot about T3 but very little about T4. Can someone explain the difference between the two. Also, what is the proper dose of T4 when used with clen?

[Atomini]

T4 is originally made by the liver. T4 is converted into T3 by the thyroid, and therefore exerts its actions slower than straight T3.

That's all I know.

[powerliftmike]

T4 is originally made by the liver. T4 is converted into T3 by the thyroid, and therefore exerts its actions slower than straight T3.

That's all I know.

Off the top of my head, I think you got that backwards. T4 goes into the liver to be converted to T3. T3 is most active thryoid hormone in the body, and thus the most powerful in its effects.

[Atomini]

Off the top of my head, I think you got that backwards. T4 goes into the liver to be converted to T3. T3 is most active thryoid hormone in the body, and thus the most powerful in its effects.

Oh yes, that's right. I did have that backwards.