During the fast I felt pretty good. I would say my energy level was down about 15%. The 2 days I worked full days and had plenty of energy. Saturday morning before breaking the fast I tested my blood and urine ketone levels. Blood ketone levels were high at 4.8 and urine levels were high too. I really like doing this 48 hour fast.
I noticed after the fast my body felt reset. I felt less craving and more controlled eating. I am thinking about doing this once a month or ever two months.