You have taken my initial comment in isolation and twisted it into something negative which was not at all what i meant. Diet is an implicit requirement as i mention in my previous comments here - https://news.ycombinator.com/item?id=40978488. Also see others here - https://news.ycombinator.com/item?id=42138469

> Feelings are inherently irrational, we shouldn't advise people to act on them.

This is silly and wrong. Emotions and Feelings are fundamental to Mental Health and by extension to Physical Health. See the research by Dr. Lisa Feldman Barrett and her book How Emotions are Made.

The Mind at Work: Lisa Feldman Barrett on the metabolism of emotion - https://blog.dropbox.com/topics/work-culture/the-mind-at-wor...

> The "feeling hungry" part is emergent, root cause largely being the diet.

This is silly and puts the cart before the horse. Raw Hunger is the root cause and search for food is the consequence from it. Humans have evolved to eat and digest a wide variety of foods but if you only eat harmful ultra-processed food as a lifestyle choice that's on you and needs to be changed. In addition to a proper diet, one should only eat when feeling raw hunger which can be helped with techniques like Time-Restricted Eating/Intermittent Fasting etc.