I ran keto a few times, it works but is very harsh.
It can contribute to some pretty fast weight loss for sure.
Your basics are, carbs should be set at zero or negative. This is produced by fibre intake, one gram of carbs cancels with one g of fibre.
Running it is a complete bitch and you turn into and ass hole(@ least I do). The no carbs and deficit make me very irate. Specially since I runt the EC stack while running ketogenic.