Your Question: Which is best for helping control my thyroid function? Cytomel or Synthroid?
Larry’s Response: Liothyronine (T3, Cytomel) is superior to levothyroxine (T4, Synthroid) for controlling thyroid function.T4 is normally converted to the active T3 in the body. The conversion process often seems to be at the root of the problem. When T4 levels are normal and the person still feels poorly it is likely because he/she isn’t converting efficiently.
T4 itself also pushes TSH levels to normal, but often fails to make the person feel better.