RZCers always talk about how essential the raw fat is, to avoid problems. If you want to stick to RZC but have a problem of getting hold of regular sources of raw animal fats, all I can suggest is that you go in for fasting during those times as water-fasting is, I gather, a state involving ketosis just like with an RZC diet.Oh, and some RZCers go in for making lots of pemmican(raw beef jerky plus rendered/cooked animal fat) for when travelling etc., as they cannot always guarantee a constant supply of raw animal fat.