I’ve had hashimotos for a decade, I’m 27F now. Been on stable dose of levothyroxine 137mcg for ~5 years now.
I have done IF for just as long. I take the pill first thing in the morning, I don’t eat until dinner usually. I lost 50 pounds in a year doing this. That was 2018 and I’ve maintained since then.
I am 150 lbs currently, doing longer fasts of 40:8 to lose 10-15 more pounds, then go back to maintaining.
My Hashimotos does not affect my ability to fast effectively