Human health and nutrition is, of course, highly complex. A substance may be generally healthy in one formulation/concentration, and tend to cause health problems in in another.

A "whole food" is not strictly defined, but is "Group 1" in the Nova food classification you mentioned.

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You can save posts and comments. The list is in your profile.

I've not yet found a way to list upvoted posts. I suppose I could click Save for every post I upvote.