[userbinator]

Nor governments.

However, I do think the stores likely already have such data about you, if you take advantage of any of their offers to track you.

It's a little disturbing to see this slow normalisation of mass surveillance, one little thing at a time.

[FoodCoach]

Hell, knowing what people actually eat and comparing it to their actual health would be extremely helpful, especially combining with a massive data-set and big data.

Food studies are currently based on recall... and peoples recall is horrible. "What did you eat last Monday for breakfast, and how many grams of it did you eat?" The inputs are garbage and the outputs are garbage. Linking actual food intake to healthout comes would be VERY powerful.