When your blood has high concentration of glucose for a sufficient period of time, your pancreas kicks insulin into gear, which tells your cells to take in glucose, put it in a temp storage (like RAM in your computer) called glycogen, and put everything else into long-term storage inside your fat cells.
If you want to lose weight from fat cells, those cells need to store fewer calories than they release. What most people do not understand, however, is that this is not as simple as “calories consumed” vs. “calories burned”; a low amount of carb consumption (~25g/day) makes absolute caloric intake less relevant to fat loss.