I think Megan Ramos talks about how good IF is for women around that age, especially with hormones making you pile on the weight without you doing anything differently. She may also have really lowered her metabolism by eating so little so IF would help jump start it.
I’m turning 65 this years and I dropped 30 lbs a few years ago through IF. I’m not hard on myself and when I gain about 5 lbs on vacation I know it’s easy to come off when I get back home. I’m very active and was able to keep it off after being sidelined with major back surgery. I have two close friends that struggle with their weight ( they’re on weight watchers all the time). They’re terrified about being hungry, you really have to get out of your head.