Your body weight and inability to loose fat can be from low testosterone and/or thyroid problems.
TSH and fT4 look OK. But sometimes things are more complex than that.
You can check overall thyroid function bu checking oral body temperatures as described in the thyroid basics sticky.
Please see these stickies found here: About the T Replacement Category - #2 by KSman
- advice for new guys
- things that damage your hormones
- protocol for injections
Other labs:
LH
FSH
complete blood test
hematocrit
E2 - estradiol
prolactin
AST/ALT
TT, total testosterone = S-testosterone
Your thyroid drug: Levothyroxine - Wikipedia
is T4 hormone and your body needs to convert to T3 hormone
free T3, fT3, is the active form that is used to regulate your metabolism and body temperature
Some do not convert T4–>T3 effectively
reverse T3 can block fT3 too in some cases
You need iodine and selenium in your diet.