Eat whatever you want as long as it isn’t a carb. Height fat - medium protein.
They analyzed the Iceman’s last meal. It was over 50% fat.
https://www.scientificamerican.com/article/heres-what-oetzi-the-iceman-ate-before-he-was-murdered/
thanks
https://www.cell.com/current-biology/fulltext/S0960-9822(18)30703-6
Actually, the fat content in his stomach was 46% fat.