wow, u r in the 99+ percentile for good eaters and we already know u don't need any more exercise.
I did not ask; what is your height and weight and in your case; I bet u know your body fat, BMI?
BTW the image currently popular of ladies with flat tummies is not found in history; let me give u another example; men r the same, if u look at johnnie weismiller (sic) who played Tarzan after a world's bets athlete he did not have any of the definition physically that is considered today as good health; and let me give one more because it popped in mind; we hire people to move when we move and the last time; we had some ordinary looking Mexicans who would put any body builder to shame NOT BECAUSE THEY had better defined bodies; but because they could pick up and care 130 lb pieces of varying shapes and haul them back NON STOP for hrs. (i would have ended up in the hospital making the moving cost trivial)
EXCUSE ME BUT I JUST MUST ADD ONE MORE
i remember an interesting interview with jack lalane who i bet u know of, and linus pauling , u may well know nobel prize winner for work on vitamin c
pauling said he expected to live into 90s and looked like the pilsbery doo boy, lalane said he expected to live to 120 BUT pauling lived to 93 and lalane to 97 (u can draw your own conclusions) sorry about the spelling;
here is something u can try;
2 things; flood your body with probiotics of at least 100 billion culture counts daily for 2 weeks and at same time; cut your exercise by 75%
I KNOW it sounds counter intuitive but u could use the rest anyway and also try the other armor thyroid to see if u r one of those who claim there is a difference. ALSO since u r such a healthy person u might consider KIFER as u seem the type to be willing to do the effort
best wishes