"The next phase of events begins to take place 6 to 12 hours after your last meal. At this time, your digestive system goes into a period of rest. The nutrients from your last meal have been digested and absorbed into your bloodstream where they were met by insulin, which helped to move them to your cells for use or storage. With insulin’s job completed, your pancreas no longer needs to produce as much, leading to low insulin levels."
(Excerpt From: Fasting Effects – Here's What Happens Inside You During a Day of Intermittent Fasting: )