Anyone else isn't a picky eater growing up, but has become one now?

I used to be alright with trying new food. The only two food I don't eat are eggplants and oysters.

Now I don't eat a lot of food. I don't eat all seafood except clams, I eat only a selected few of vegetables, I only eat meat when minced, I don't eat eggs or bread, and I don't drink sweet beverages other than honey.

What are the reasons someone may become more selective of their food?