Re: Med question: when you take T3 ( Armour or Cytomel )?
T4 reaches peak levels within 2 to 4 hours and remain high for 6 hours.
The peak level of T3 is hit within 2 to 4 hours following the dose. I'm unsure how long it remains high, but it wouldn't be as long as 6 hours, I'm fairly sure.
You don't necessarily want to dose according to those peaks, however. They give a false picture of the actual cellular levels, and can keep an MD from increasing the dose when it's needed. What's your reason for wanting to know?
Last edited by moderator2; 03-30-2008 at 10:40 AM.