Sorry, I don't.

Figuring out what genetic markers might or might not help seems like the kind of thing Metamed might be helpful for, but it's pretty expensive. A cursory literature search turned up one or two things, but as I'm neither expending a lot of time on it nor an expert in the area, I don't think it would be useful to pass on.

A lack of actual ketosis, in a ketosis-inducing situation, is a pretty strong indicator of that something is going on - figuring out what is potentially valuable, if you could find a friendly geneticist. Pointing that out is the most I can do.