Watching Dr. Ted Naiman's talk at the Beyond Keto Summit https://themidliferelifeblueprint.app.virtualsummits.com/
He summarizes something extremely well (I paraphrase): gorillas must eat 60 pounds of plants a day so they are chewing 80% of their awake time just finding enough food. I feed my dog twice a day and he eats his food in 60 seconds. So it is chewing all day versus eating for 2 minutes. It is much more efficient to eat animal proteins than plant proteins.
I think he captured the essence of plant-based versus animal-based diet: animals concentrate plant nutrients so eating a small piece of an animal is like eating a huge amount of plants.
He also recommends to start your day with your first meal, whenever your first meal is, with protein and no carbs. Always eat protein first to make sure you ate all the essential nutrients you need and if you are still hungry, eat then veggies. But make sure you always get all the protein your body needs--protein comes with fat so that's included in his analysis though he eats less fat than most people think a keto-way of eating should be.
Mind you, this is also my findings: members in my migraine group who eat carnivore with high protein ratio, they are all in ketosis even though they eat less fat than the usual carnivore. According to Naiman, he had some studies in which people could comfortably eat 80% of their Calories from protein and 20% fat--this is equivalent to 360 gr protein and 40 gr fat (1800 Calories), so a LOT of protein, 2.5-3 gr per lbs of person weight. So way more than normally recommended.
For those familiar with my CD protocol, this is much higher in protein than my protocol, which many consider quite high: by weight, this is 90% protein and 10% fat. My protocol is 60-70% protein and 30-40% fat on the CD/ZC diet.
In his experience there is no chance a person can overeat protein--unless some rare genetic disorder--so he presses on recommending lots of protein, including chicken breast and similar. He recommends eating beef for its nutrients, including heme iron.