For my friends and clients working to get into and stay into nutritional ketosis, I posted one day's worth of meals from Peter Attia's web site as an example. This post is Attia's typically long and information dense post, but I think I'm on read number five or so and still gaining insights into what he's teaching. IOW, I like it.
Note the percentages of intake:
Carbs - 90g or ~360kcal
Protein - 131 or 419-524kcal (some say an average of 3.2kcal of protein becomes fuel after to losses in hair, skin, nails, and protein spills from urine)
Fat - 218 or 1962kcal
Thus, his intake is ~80% fat. He is measuring his "success" in nutritional ketosis via a ketone measuring tool (.5 to 1.5 mmol/dl being ideal for "nutritional ketosis"), which was something like $1000. You and I can get a pocket ketone meter nowadays for a few bucks, but the strips are $2-$6 each. Thank you Canadian online pharmacy for the $2 strips! Without that I would not be willing to do the ketone self experiments.
One more note - Attia thinks of himself as an cyclist aka endurance athlete, but also does one workout in three of relatively high intensity core strength and conditioning work.