the changes in the testosterone and the igf-1 are what concern me along with the t3 we see this a lot of times in ketogenic diets and this happened to me my tsh didn't really budge but my t3 went down and my basal body temperature went down i think this is the body entering a sort of you thyroid sick state a caloric deprivation a sort of starvation survival state that i don't think is optimal for humans and we see that in the testosterone decline