Unlike my previous technical post, this is a personal experiment. I am not a doctor, just a FOSS developer. Sometime in Feb 2026, I decided to try a 72-hour water fast after reading about someone else's experience. I lasted 44 hours before breaking it due to hunger.

After researching alternatives, I switched to a weekly 36-hour rolling fast using ChatGPT for guidance. I chose Saturday as my fasting day, starting Friday at 5pm with only water until Sunday at 9am (40 hours). ChatGPT provided real-time updates on my body's status, suggesting remedies like salt water for headaches. Given my history with kidney stones, I followed advice to drink 3L of water daily.

Over four months, I completed 16 forty-hour fasts, losing approximately 14kg and 4.5 inches from my waist. This approach fit my lifestyle of minimal exercise, allowing me to enjoy junk food once a week while maintaining clean eating three days a week. Key takeaways include starting fasts properly, breaking them correctly, and closely monitoring health with AI assistance.