Of course, you can do this research on your own, in person, by simply looking at the front of a package and all of its “healthy” claims, and then reviewing the back to see it’s ingredients and nutrient amounts.
This is where the back label comes in handy - look through the ingredient list and make sure those ingredients are what you want to eat.
Though most things with ingredients are processed in some way, I like to make sure that the list is SIMPLE, that I can understand it, and that there are not too many additions for color, flavor or preservation.
When you are looking at Calories, Protein, Fat, even Sugar - look at the Serving Size and determine if that is actually what you’ll be having.