Tim Spector is a better scientist than anyone publishing in poultry science journals ( which I also read). It is a book, not an opinion piece. You appear not to have read even post 1 in that thread, or not understood it in any case.There are scientists educated specifically in Poultry Nutrition who publish in accredited science journals, they have formulated the standardized diets for poultry.
They are employed by the poultry industry to help maintain millions of production fowl.
I'm sorry, but I've never viewed that fad diet author quoted in your thread as a legitimate source. An opinion piece does not compare well to biologically tested facts.