The trick is to build your metabolism. Which means eating healthy and exercising and
keeping at it. It does take time. I am at least two years from the start of my journey, maintained for at least a year, work out every day and food does not touch me any more if I have an extravagant day/fortnight.
But you are right, some people are more sensitive to food and I certainly was at the start of my weightloss.
Not any more though. As long as I stick with the program.
The difference between my size 2 friends and the old me was that they would work out
every now and again and eat
mostly healthy while I would stuff my face with cr@p
every day, doing nothing
every day, sitting on the couch
every day watching TV
for years.
So little wonder they had a metabolism and I did not. And it took my body some time to adjust.
But I have caught up now. And in most cases overtaken.
I am the one that goes back for thirds now. Every now and again.