>Almost all fooeds seem to have one of those

Almost all prepared, packaged, or preserved foods have one of those.

The solution is actually pretty simple: eat meals made from base/raw ingredients only.

Beans, nuts, meats, vegetables, fruits, vegetable oils, spices... Endless varieties of stuff to cook with, combine, and eat alone. People just aren't used to eating this way, because prepackaged crap has been the norm for so long.

You are right that if you're poor, it's difficult to eat this way, though.