The best diet for humans is the one that we and our ancestors have eaten for millions of years, before we started thinking we can outsmart nature.  If you look back at how humans have evolved, you’ll realize that we’ve eaten a diet high in animal products (protein and fat) and relatively low in carbs. Plants were a necessary survival food to fill the gaps between successful hunts.  I call this the paleolithic ketogenic diet and it’s more a framework than a specific diet.