Hmmm iirc, and don’t take this as medical advice and do your own research/consult your doctor, but in states of ketosis in high fat diet, cholesterol rises but primarily in the form of HDL (high-density lipoprotein) while LDL (low-density lipoprotein) level drop. For heart disease, LDL is the concern as it’s floaty and thus gets stuck and accumulates in arteries, while HDL is considered more “good/harmless” as it doesn’t do that.