Sounds like the app I'm building now. :)
Either if you (x86mitch / matthuggins) are welcome to them if of interest:
Nutrition Works
https://www.dropbox.com/s/iyvai1jbredx6n9/Screenshot%202019-...
Nutrition Engine
https://www.dropbox.com/s/hchcz4vciik1w28/Screenshot%202019-...
I'd be interested in chatting about it, but you dont have any contact info listed in your profile.
if you're using schema.org there's a nice filtered data dump from the common crawl available here:
http://webdatacommons.org/structureddata/2018-12/stats/schem...