Intermittent fasting is an intentional time frame where you don’t consume calories(Time-Restricted Feeding). Contrary to what most people think, this does not have to be for 24 hours or more. Where fasting that long is very beneficial, it is not necessary on a daily basis. Think of intermittent fasting as a designated “eating window” and “fasting window” Your eating window, the time when you consume calories, should not be more than 12 hours. Your fasting window, the time when you don’t consume calories, should be at least 12 hours.
Your digestive system needs at least 12 hours to digest your food. But a fasting window of 14-16 hours is ideal if you can build up to that. 14 hours is the amount of time your body needs to enter into autophagy. Autophagy is when your body cleans up and gets rid of dead and damaged cells and creates new cells. This is necessary for a healthy immune system and metabolism. It is especially important for your brain health.
The longer days of fasting, 24-48-72 hours, is when your body really kicks into full autophagy. This is very beneficial but is very difficult and I wouldn’t recommend starting with this. Start slowly and talk with a professional if you have any current medical conditions or if you’re on any medications.
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