From Wordnik.com: ennui (on WEE) - noun - A painful or wearisome state of mind due to the want of any object of interest, or to enforced attention to something destitute of interest; the condition of being bored; tedium. … A gripping listlessness or melancholia caused by boredom. … from Old French enui, from ennuyer, to annoy, bore; see annoy.

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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