Phytochemicals are 5 to 20 times lower in animal source foods than in plant sources, with unknown bioavailability.

“the phytochemicals we do get them through animal source foods but they are about five to twenty fold lower than if we get them directly from plant roots and we don't know about the bioavailability yet”

“it represents an avenue by which additional unique phytochemicals are ingested because animals consume plants that you and i cannot consume so it's a way of increasing the the diversity of these of these compounds”