I’ve gone Keto. 2 meals a day in a 6 hour window. Minimal carbs. Fruits consist of mainly berries. Mixed nuts (walnut, almond, ...). Meals usually with turmeric, black pepper, olive oil.
Lost weight. Never seem to have cravings.
I've started the 5:2. 5 days, I do like you, but make sure I get in the normal 1700-2000 calories, then on the other two days, I just do 1 meal of 500-600 calories.
The key is to not do the same thing every day, so that your body doesn't adjust to it, eat at different times of the day, and vary the calories from day-to-day.
I also did a 72-hour water fast at the beginning of the month.
I hope to do the same at the beginning of every month.
After about 40 hours, I wasn’t even really hungry, I had to force myself to break the fast. And just eat a few small meals immediately after breaking a fast. You don’t want to get “Refeeding Syndrome” by eating a lot of carbs after breaking a fast.