nothing is cut and dried and people can and will eat anything if they are starving, but yea, the best human food is the fat of herbivores and fish - exactly what modern science tries to talk you out of but its all in the taste buds. the flavor is in the fat, everybody knows it. the meat is always the main dish. the rich eat dish after dish of meat in a meal. they are also smart enough to eat the organs. you could feed yourself like a snake - swallowing little babies (or chunks thereof) of things whole. fruits are seasonal. of course we eat them then but then they are gone. honey is the only other sugar thats good to eat. and if one is in good shape, i give that maple syrup is a good food. but needing greens in the gut for any reason is not true. not as a daily diet item.