Comment by Panoramix

It's everywhere - in the US.

Natural yogurt should be relatively easy to find. Add some real fruit if it's too dull for you (after a while it's not).

Basically try not to eat processed stuff. Sure, you're not going to die if you eat a pizza here and there, but the baseline should be to eat as much real food as possible, as opposed to processed food. Even for pizza, you could find a place which uses fresh ingredients as oppose to a big franchise where everything is heavily processed and frozen. Finally, give it a try to make your own pizza/yogurt/etc. It can be a lot of fun.