I'm certainly no expert! My knowledge is well over 10 years old and is probably terribly out of date now!

I'll tell you that I've done a lot of research on this subject, and almost everything you say holds true. Perhaps the biggest change is the difference between men and women due to hormonal issues and the changes that occur at different stages of life. But even so, the general information applies to everyone.

The app you mention seems interesting. I looked around but couldn't find it; it's not available. However, there are similar apps.

As for what you're feeling, I understand. I know that in more industrialized countries, people tend to consume a lot of processed food. In my case, and perhaps in many homes in this country, food tends to be simpler, in the sense of less processed, perhaps also due to a lack of economic development. So the situation may be different in that case.🙂

In my case, I also deliberately try to avoid ultra-processed foods.