Thyroid problems are no problem in this career (with the right doc).

Been hypothyroid for 20 years. Well, started out hyperthroid, took meds for that a few years, then finally killed off the thyroid with radio active iodine, so now I'm hypothyroid, and on meds for that. A generic synthroid.

First Class Medical the whole time, and now even the Koreans have bought off on it and given me a Korean First Class medical. Which is an astronaut medical.