Interestingly, I have a similar problem. I eat low carb diet with an even protein and fat mix. However, my fasting blood sugar level still seems to linger around 100.

Stress and lack of sleep can dramatically raise blood sugar. I don't have diabetes but I check my blood sugar fairly regularly with a $30 glucose monitor. Bad sleep raises my fasting blood sugar to a level I would normally have after a bowl of ice cream.

What's your theory about the blood sugar?

I have the same issue. Hovers around 100 when not eating. What's weird is it drops to 85 within 20 minutes after eating a meal. I'm not sure what that could mean.

blood sugar is mostly regulated by hormones: glucagon and insulin. Not really by what you just ate. Hence why you can go days without eating and still have a normal blood sugar. Eating causes your pancreatic beta cells to release insulin (in response to elevations in blood glucose). Diabetics have spikes in their blood sugar right after they eat because they have impaired insulin sensitivity and so their tissues (muscles mainly) don't take up the sugar in the blood (a process mediated by insulin receptors).

I thought the literature suggested it worked better for women.

I'm basing this on my experience and numerous conversation with others which albeit is anecdotal and sort of worthless.

A quick googling shows mixed "feelings" (I stress feelings because I haven't seen/found an adequate reference yet).

Maybe later I will investigate it.