Ketosis is fat burning. If you have been living on sugar your whole life, and now you are switching your body to a completely different fuel source, your cells have to build new machinery for fat and new enzymes to break down a completely different source of fuel. This takes time. So, how long does it take to get into ketosis while fasting? If you are already really healthy, it could happen in maybe one week. But, on average, it is going to take about 4-6 weeks.
How do you know when you are in ketosis?
• When you are satisfied after you eat
• When you can go long periods of time without eating and not be hungry
These side effects only happen during the transition phase. If you push through it, you can receive amazing health benefits. If you start the Ketogenic diet and intermittent fasting correctly, these symptoms should not be a big problem.
If you focus on losing weight first and not the health part you may or may not end up healthy. Healthy people do not actually gain weight if you are truly healthy you are not going to be overweight in the first place.