I guess this book is a good start [0].

I read it, I wanted to believe it but I will not endorse what’s in there (mostly because I am now much more cautious about cherry picked slick slightly against the establishment stories).

While here I will post a book that did change my life in a rather dramatic fashion [1].

Also a good functional medicine doctor is worth every bill they charge.

[0] https://en.m.wikipedia.org/wiki/Why_We_Get_Fat

[1] https://www.amymyersmd.com/sp/the-thyroid-connection-paperba...

The diet-heart hypothesis promoted by Ancel Keys was based on bad science, cherry-picked data, and gross generalisations. The saturated fat used in his experiments was vegetable oil (margarine) and he extrapolated the results to animal fat.

The current theory is that heart disease is caused by vegetable oil and sugar.

The Paleo and keto enthusiasts demonize Keys as the root cause of the western world's obesity problem.

For books, try

    * "Good calories, bad calories" - Gary Taubes
    * The Paleo Solution - Robb Wolf