Yes, a general principle that comes out of research behind Good to Eat is that there are no world religions that have acted to decrease the potential for the nutritional well-being of their followers.

Pigs eat grass if they are very hungry, but they can't use it as a regular source of food.

Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories have done. It is open to being challenged and to being proven incorrect.

In principle the great religions of the world do not differ as much as they appear to.

Being champion is all well and good, but you can't eat a crown.

However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.