I know my metabolism slowed way down in my mid 40's {51 now},
that was about the same time I started getting RSIs and shoulder/neck strains, had stress from that situation and trying to keep working at the time- plus work comp {cortisol/bellyfat??}, plus being skinny all my life I never had to watch calories, and I am a pretty good cook so that is even harder to avoid my own good cooking!

If food isn't that great I can avoid it but if very tasty - yummmm!