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
>