My father worked in Mongolia and observed how local people in remote rural areas ate. Calories came only from meat of horses, sheep, camels and some small game plus fermented camel milk. There were no vegetables or any other plants besides few herbs that they used for tea. This is not surprising as it is very difficult to grow there anything but local grass, so one can survive only from animals that can eat that.
My father does not remember that locals got some particular health problems from that. Old people looked healthy and worked pretty much until the dearth. What is especially interesting that it was also true for descendants of Russian emigrants there from 100 years ago, but they did grow some vegetables and cereals.
Of cause, that does not prove that meat is healthy. But it does show that in a particular climate eating only meat is not harmful when the meat is from animals that was treated by locals with extreme respect and that were fed on grass that was either fresh or covered with snow at winter.
My father does not remember that locals got some particular health problems from that. Old people looked healthy and worked pretty much until the dearth. What is especially interesting that it was also true for descendants of Russian emigrants there from 100 years ago, but they did grow some vegetables and cereals.
Of cause, that does not prove that meat is healthy. But it does show that in a particular climate eating only meat is not harmful when the meat is from animals that was treated by locals with extreme respect and that were fed on grass that was either fresh or covered with snow at winter.