Fasting has helped my stomach issues immensely! I don't know what my sensitivity is/was, but taking it away 3/7ths of the time has really been a lifesaver. I have also noticed a definate drop in migraines. From 2-3 a week to that many a month. And women can/should fast, no problem. I don't have thyroid issues, but I wouldn't think it would be a problem, it might even take some of the stress of your system and help you out. I hope this helps!

Burg, I would really caution you to check with your physician before starting IF. Hopefully, your doc is receptive to 5:2. Since Hashimotos is an auto-immune disorder, coupled with the fact that it affects your thyroid, the diet may not be the right one. Perhaps your doc would be willing to run more frequent blood tests during a test phase to see how or if it affects you negatively? Either way, I think having a conversation with your endocrinologist would be the way to go to make sure you don't negatively impact your health. Unfortunately, there isn't a lot in the way of human studies with IF to give you a clearer answer.

I have Hashimoto, and have been fasting for 2 years this month. No side effects here, except for losing nearly 30 pounds!! Woo Hoo!!