I wonder how the TSH levels were a week before the 3 day fasting, I'm curious if that -2.37 delta is from only fasting or your TSH varies that much too often.
Good question. I tend to be on the higher side but after doing a 5-day water fast, several 3-day ones and IF year round I’ve seen that fasting more than 1 day has a significant impact on my* hormones.