I’ve been keto since mid-February. I’ve done a handful of fasts, a two-day, a 3-day, a 5-day, and I just finished what was supposed to be another five day, my first true water fast for autophagy. On all the previous fasts, I had done almost exactly what you described with using the Bulletproof Coffee and broth and coffee with heavy cream to get me through the first couple of days and then tapering off to almost nothing at the end of the fast. It seemed like a natural progression because I didn’t need any of the fat or calories on those later days. For all my fasts, I also supplement with salt, magnesium and potassium.
I really thought that because I had already done a five-day fast with relative ease, that this one would go well as well. I was wrong. The first 72 hours we’re not much different than my previous fasts, even without the help of fat, but on the fourth day, I started to feel wrong - my head ached, I lost the vitality that I’ve been used to having on keto especially during extended fasts, and by evening I decided to go ahead and have a bulletproof coffee to see if I could last that final day. The coffee didn’t work, so I decided to break my fast and ate a moderate meal. The next morning, I still felt off with muscle aches like I get sometimes when I have diarrhea. I felt slow and sluggish, and again just not right. Things got better through the day as I ate my normal Keto fare.
I don’t know if I got my electrolytes screwed up with the supplementation, or if the fact that for some reason I only got 3 hours and 21 minutes of sleep that third night is what caused my issue. My third day of fasting I had so much energy and did so many productive things that I almost felt a little manic. The result was that my mind wouldn’t quiet down and let me sleep.
I lost 7.6 lbs during the 4 days of the fast, bringing my total loss since I went keto to 34 1/2 lbs, on top of the 21 lbs I lost doing Paleo before I started keto.
I will definitely try again because I’ve had more good experiences with fasting than bad. However the electrolyte thing scares me a little bit. You can really mess yourself up if you get that wrong. Has anyone else had an experience like this with either lack of sleep or bad electrolyte balance throwing off their fast? I.could use some advice to prevent things going wonky next time.