I'm in my 60's and post menopausal.
i eat when hunger beckons me.. which is usually twice a day.
i'm not a snacker..
i eat protein at eating time.

but in all honesty.. when i fast, the longer i go, the better i feel.
it's just getting over that first 30 hr hump, that is the hardest.
but once i get over it.. i sail...

but daily life is usually 2 meals a day.
large breakfast, modest dinner.

fasting got me to a size 10 women's.. which I have been maintaining for 2 yrs, now.