Anyone take T4 on cycle? I have noticed sources marketing T4, but I can't
understand why bodybuilders would ever include levothyroxine. It takes almost
2 months to kick in, so a proper diet would easily replace any of the positive
benefits users claim to experience once they finally reach the levels desired.

Thyroid glands are resilient and seem to bounce back quite well. But adding
this hormone is shutting down another part of the endocrine system not making
PCT any easier.

T3- I can see it's place for someone getting ready for the stage and looking
to drop those last few pounds.

I dabbled with T3 in my 20's because I had too much weight to cut for a fight.
I never looked more flat on a drug. I also felt weaker as it's extremely catabolic.

Open to discussion!