There is an optimal protein intake range for humans, below which sarcopenia and bone density issues can occur, and above which negative metabolic effects may arise.

“I think that there is a low end for protein if we get too little we're gonna get sarcopenia we're gonna get bone density problems we're gonna lose muscle mass but there's a clear sweet spot for humans for protein and my impression of that is something like point 7 to 1.1 grams per pound of lean body weight that's a little more than a lot of people recommend I mean maybe you could go to 0.6 maybe 0.6 to 1.6 is my number yeah point 6 per pound of lean body weight not kilograms per pound and so I think that that's what you want to find and it's a real easy metric to follow you can look at your fasting glucose that people have a CGM or a continuous glucose monitor you can look at those the amplitude of the postprandial glucose excursions which on a carnivore diet will be very low because the fast the glucose throughout the day is very mellow but people can look at the fasting glucose they can look at their a1c and if they're eating too much protein you'll see those bump up a little bit they edge into the 90s the facts in glucose goes into the 90s and that forend that a1c goes above 5.4 I think no that's I don't like that”