I think most things in moderation are good. I have known this for a while about fruits and veggies. I tend to think a bigger concern is minerals and vitamins. A century or more ago we used to dump our ashes from the wood burning stoves on our gardens and we were able to get out 90 minerals an vitamins. Today we get few. Our pets get a better diet them many people do. Dr. Joe Wallach has done much research on this and has a video out called 'Dead Doctors Don't Lie'. Thanks for an informative and thorough post my friend for which many enjoy.