Tibetans thrived with low-carb diet for thousands of years in the most inhabitable human conditions with flying colours. In fact, history would have it that Tibet was known as the land of the red faced carnivores. Modern day animal based ketogenic diet is almost identical to what the Tibetan nomadic people traditionally ate for millennia - a diet that comprises very little plant foods and therefore a very low-carb high-fat/high protein ASF diet.