Four day fast. Only water with some salts added to replenish electrolytes. I did two three-day fasts a long time ago and it a rough time starting day two. The electrolytes made all the difference.
It helps a ton. It's amazing how much energy we can get from salt. I had a similar experience when I started fasting. Now I tend to drink some salt water. What was the intentions with your fasts?
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There's a ton of research on the health benefits of long-term fasting. I do have to say I felt great afterward.
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I'm sure there has. For me, the research I pay the most attention to is my own.
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