Just wondered this?
IVe had such a bad time with my muscles and am probably hypermobile (see rheum next week) but given the fact muscles need t3 (and body builders get it on the black market!) wondered if a rheum might ever suggest it's a idea to try it? The more I look at and experience and consider hypothyroidism treatments the more I think it's more a rheumatology thing than endo.
I'm going to explore it after I'm sure my ferritin, b12 etc are very good and only if I'm still having issues.