I don’t think I ever experienced any of the so-called negative side effects of going into ketosis. Maybe it’s because my conversion to living this way was more gradual over the course of years. I wish I knew what I was doing a couple decades ago. Then I could have measured it all and had some concrete ideas. But, it just happened naturally for me.
Making the transition into ketosis can be daunting. During the first few days with limited carbs, keto dieters often report experiencing the “keto flu”: fatigue, muscle weakness, insomnia, and digestive issues like constipation, diarrhea, dehydration, and brain fog. Another side effect can be bad breath, resulting from elevated ketone levels. Acetone, a ketone excreted from the body in your breath and urine, gives breath a slightly sweet smell.Inverse.com
“If you can survive the one week of feeling lousy, most people who get through that don’t look back.”
“If you can survive the one week of feeling lousy, most people who get through that don’t look back,” Dr. Ethan Weiss, a cardiologist at the University of California, San Francisco, and founder of Keyto, a company manufacturing breathalyzers to monitor ketone levels, tells Inverse.