Americans who started making their own food, do you notice any health changes?

For those who mainly make their own food from scratch and ingredients, have you noticed any health changes?

I remember seeing stories of people going overseas and noticing they feel less "sick" and start losing weight despite eating the same.

As well as overhearing a few product advertisers say that they have to change the recipe for certain foods for Americans, mainly adding more sugar.

I was wondering if anyone noticed this while switching from pre-made stuff to mainly self-made in The States?