Edit: Since I got curious and followed a bunch of other studies, here's a cool calculator based on some of that research and the (admittedly flawed) NHANES data
that what called (by /r/keto people) "lazy keto". which works only for some people. and for me, for example, doesn't work. You still have to monitor intake (again, said by /r/keto people) It is just easier to avoid hunger and energy losses while being on keto diet.
http://www.ncbi.nlm.nih.gov/pubmed/15615615
Edit: Since I got curious and followed a bunch of other studies, here's a cool calculator based on some of that research and the (admittedly flawed) NHANES data
https://www.supertracker.usda.gov/bwp/