Hi Jim, Yes, at least reduction of ketosis is one way to interpret these variations in results. Maybe my protein requirements are less than my wife's which leads to greater utilization of protein-derived amino acids and peptides for the usual tissue repair and replacement immune function, etc. Or maybe there is a difference in liver function in ketone body production. Or maybe there is another explanation we haven't thought of yet. A fellow I am working with toward weight loss (he has lost 45+ pounds so far) can't tolerate as much protein as I can without compromising his ketosis (although we don't eat the same meals, I monitor his food intake fairly carefully), so there is a continuum there that shows differences that are quite pronounced. best wishes, Ron > > R > While the body may be using mostly fats for energy, it will use > some glucose as well. It isn't an on or off thing. It is a question of > proportions. Typically, the more fats that are consumed as energy, the > deeper the level of ketosis, but that also varies from one individual > to the next. My wife and I can eat identical meals for several days. > She will reach moderate to deep ketosis (40 to 80 mg/dL) while I will > only experience mild ketosis (about 15 mg/dL). > > I did not know that. Interesting. So if even a tiny amount of excess > protein is consumed, glucose is produced (rather inefficiently) via > gluconeogenesis which the body will burn preferentially, therefore > reducing ketogenesis? > > Jim >