takes fucking ages to move right through the digestive tract, apparently, and causes all sorts of disease and shit, even with a balanced diet to back it up.
anyway, one man's meat is another man's poison, or - as you put it - "Some people do fine on these new foods, but others lack adaptations to them. One person's hearty breakfast is another person's heart burn."
i have no argument with anyone who wants to eat meat themselves, as long as it's organic and humanely farmed, but i do take issue with people thrusting their dietary facism down my throat, ta.