@Trenbolonetax corrected me on this.
this is why i said "sane doctor". keeping it that low is considered as hyperthyroid. it puts unnecessary stress on the heart. keeping it below 1 is same as keeping your igf-1 high. it has its benefits but has disadvantages too.
edit : do not confuse reference range with that of what is considered as optimal. that reference range is based on the lab.
if you have a fracture and you take strong opioid you won't feel much pain. that means there is no need for it to be treated. correct?
no, it is not.
and what you are telling him is to basically continue messing with his thyroid which will mess with his health in few years if he continues.
1.0 is an antibattery number. it will go up or down for different people but nobody needs it to below 1.