At the time that I read this, teenaged me was very impressed and it literally changed my life, as I (and my whole family) enthusiastically adopted as many of his mandates as I could.
For decades my confirmation bias only grew, embracing new sources that agreed with my conclusions based on my adherence to Leviticus 11 from this book, while ignoring anything that did not support my opinion.
By 2009, I had begun deconstructing a lot of my lifelong ideologies and remembered how impactful this book had been to younger me, so I purchased a copy and re-read it. I ended up abandoning my long-held practice of keeping kosher.
There are plenty of Scripture citations to give authority to Josephson's instructions, but there are zero citations to support the many scientific and sociological assertions that he makes.
It's been too many years since I re-analyzed this, for me to still have my detailed notes about all the errors or misleading comments in this book, but I suggest you be very careful before making lifestyle changes based on this book. Certainly, don't use the conclusions of this author as a basis for judging others who may not embrace ancient dietary restrictions as scientific.
I just wish more people would humbly read this. Sadly most just harden their hearts, and say we are under grace, not law. Picking and choosing what laws to follow is still sin. And no, I will never be perfected this side of heaven but I certainly can do my best to follow what God has instructed. From what I see, most people gods are their bellies.
I read this book back in 1982 and it is a good read. It is very interesting concerning what the Bible says about human beings and what they should and should not eat for proper health.
Written in the 70's and has great insight to what we now call organic whole/clean eating, but not sure on his views of the Mosaic laws still all to be followed??