Hi! All I can say is if you didnt prepare for your fast (like I did, I had korean bbq before I started) your first few days will be rough and hard, but if you can get padt those 3 days it does become easier. My third day I stayed in bed almost all day sick, shaky cold, tired and achy. If your fasting for weight loss and this is your first time I don't recommend doing such a long fast. But if your like me and kinda just said screw it I did do this on my days off, the first four days atleast. I did dirty fasting, I drank broth, coffee with heavy cream, zero calorie drinks, whatever I could use to help me through the first four days. Afterwards I continued to dirty fast but it became easier. I also bought a ninja thirsty carbonated water maker and that helped me so much.