What does not eating 2 days a week do to you?

Just curious what the positive and negative is of this and if its intermittent fasting?

I do nutritional ketosis… I guess 7 days a week and generally eat 3pm-9pm 2000ish calories. I started doing it once just to see if I could because I generally go into ketosis in the winter and eat regularly (probably a little excessively) during the summer. I have been doing this for about 8 years and I go out of keto on holidays followed by a \~5 carb day then full fast day into keto.

Recently a few people asked how I do that fasting for a day to help the transition into keto and thought I would try not eating 2 days just to see how I feel. The second day is a bit… rough or weakish feeling but nothing debilitating. So I did it the following week to see how I felt and I have been just doing it for almost 2 months now. I eat the last meal on Sunday around 2-3pm its about \~1000 calories and then I eat on Tuesday the same time.

Im losing weight obviously faster than normal I gain about 10-15 lbs during the summer so I will probably drop out of keto earlier but im just curious about what the science behind this type of eating is.

I am in no way endorsing this diet model for anyone else or keto or even dieting in general for anyone else. It started purely as a personal curiosity that has now peaked my interest into what could be happening both positive and negative biologically to me. I personally have not really noticed any real difference in anything at all especially since what I assume would be the worst part of the fast im asleep and on tuesday morning I wake up regularly like any other day.