I read the book The Phoenix Protocol by August Dunning. Former Nasa space station engineer, chemist and physicist. It recommends soft dry fasting. I am doing my first dry fast at the recommendation of a friend who'd done a 7 day. I read the book. Had my brother who's a registered dietician read it and verify the scientific parts of it. I am the son of a 90 year old 55+ year nutritionist, I am a nutritional consultant so I have a good baseline and support system. So far my biggest hurdle to overcome after hunger is boredom. I am used to being VERY active and taking it THIS easy is driving me crazy. I will post my post fast results on here.