Personally, I have found that carnivore works best for me. I just finished a 6 day water fast and ate eggs and meat right away. Lots of bacon too. No issues like I have with keto or high carb. That tells me that I shouldn’t eat plants and grains.
My stomach is not bloated and I feel great. Started a dry fast last night.
In some books, it is indicated that the time to wait before returning to a normal diet should be equal to double the duration of the fast. And they talk about water fasting. I think that with 4+ day dry fasts this rule should be taken into account even if I know that the duration seems very long.
In my experience after 7 days of DF, I normally do two / three days of WF and then I start reintroducing Keto foods slowly but with the aim of eating normally at the end of the 4th or 5th day.
I’d play it safe and stick to a breaking plan of: water; then juice; then veg and fruit; then lentils; then whatever, as ling as it isn’t dry; then whatever; over the course of a week or two. That’s what was necessary for me for two weeks after 12 days and a week dry isn’t too much less than 12 days.