> I used to be able to eat 3500 calories a day and not gain weight. Now in my 40's if I eat more than 2500 I put on weight.
Could it be that chronic calorie reduction has made your body adapt?
Could it be that chronic calorie reduction has made your body adapt?
Even with special efforts, it’s only slowing/delaying the process, so progressively eating less is natural anyway.
https://www.everydayhealth.com/diet-nutrition/metabolism-may...
Body composition changes gradually over time. Going from healthy and fit at 20 to overweight and unfit at 40 can be reversed, it's not an inevitable decline.
Eventually aging catches up, but it may not be until 60s or 70s when metabolism takes a noticeable hit.
As with so much science, they got it wrong, but knowledge is getting better.