I was interested in your results during you 7 day fast related to thyroid function. Based on blood tests I have well controlled hypothyroidism (Synthroid 125 mcg/day). Over the last few years I have begun fasting (48 hour and 72 hour fasts) , time restricted eating (typically dinner only) and typically - but not always - low carb without calorie restrictions. During fasting I have continued to take my daily thyroid medications. Maybe 1/2 of the timeds in the longer fasts I have experienced being very cold. My questions: Do you have any data on how thyroid medications impact thyroid hormone blood levels during fasting? Any idea what impact continuing the thyroid meds during fasting might have on autophagy (inhibit?)?