I had a very intentional palate reset in my late teens going into my early 20s.

I wasn't exposed to any variety of food growing up and I stopped eating meat at a very young age (In my 40s now, still don't eat meat). So before adulthood all I ever ate was pasta, and almost always boxed pasta at that. I also had issues with some texture and flavors being extremely off-putting and making me wanna gag.

I knew I wasn't going to be able to eat that way forever, for a number of reasons (health being a big one) so I forced myself to try new foods, gradually. I fucking hated it, but I kept at it. I now like most non-meat foods, even enjoy mushrooms which have previously made me vomit. The first time I had avocado it was the nastiest thing I ever tasted but I eat (and like) avocado most days now.

One thing that people don't know very well is that kids' taste experience is different and for some this is stronger than others. The actual flavor sense is different or much more intense and this dulls with age.

I still can't eat fresh tomato and it isn't a matter of being picky or having preferences, it is very obvious that I can taste something in tomatoes that other people just can't and to me that taste is "poison".