I’ve done 2x 120 hour fasts over the last two years both times with some salt water… both times Sunday night to Friday dinner … the second time was easier because I knew what to expect. 

(1) Each fast, I had two periods of time with headaches, lethargy, and kinda blah feeling that I had to push through: Tuesday pretty much all day and Thursday morning/early afternoon.

(2) Sleep quality went way down starting Monday night and continuing the duration of the fast 

(3) Digestive surprises started at around 72 hours

(4) Mental clarity and focus was great Wednesday and AMAZING Friday morning / afternoon. This was the main benefit!

(5) Lost 10+ lbs despite drinking 2-3 gallons of water per day. 

(6) I wonder how altitude would impact this experience (??) 

 Super helpful! 120 hrs seems like a reasonably challenging / attainable goal. Going to do it around New Years so I won’t need to interact w the world much. Friday sounds fun! Good motivation to push through. 

 Awesome, have fun! 

 5 days complete. Thanks for the insights! 

 Awesome! Congrats!