My thyroid is also dodgy and I take thyroxine 100mcg, but what i have really found out is that there’s no way I can lose without lots of exercise. I don’t know why this is but there you go. I’ve also had a fairly good result doing intermittant fasting (eating once a day in the evening, all you can eat, but LC) and this works really well for me.

I like your 40lb loss very much so will check out the book. Thank you!