You'd think we'd have been supplementing almost all sugary foods/drinks with it for years, since it's a cheap and healthy sweetener.
Location is only used, in context, to help find healthy meals near you. (You can use the app with or without enabling this location-based feature; if you don't use it, then we don't ask for location.)
Where are you seeing messages? We don't track messages, so this is probably a mistake in our metadata.
Sorry for being pessimistic, it's just whenever I see a health related app I immediately look at the data collected and data shared sections and get concerned. Especially if it's being shared with insurance companies.
Quick edit: That "messages" part might be only in-app ones. Google does not word that well in the summary.
Your data isn't shared with insurance companies.