This show was recorded BEFORE Lois got more information about how blood glucose works. There is mis-information in this (that the existing blood sugar is removed and stored before new glucose is added) which has since been corrected in Lois' later talks. (The correct info is that your glucose levels are monitored in the body and if there is already enough in the system, some "NEW" glucose is stored rather than being added.)
To hear the latest, more correct explanation of how your digestion and movement effects insulin use, glucose levels, and fat creation; visit UCD's 2017 Whole Earth Festival for Lois' talk: "Does sugar make you fat? Does bread make you diabetic? Understanding how your body handles food and blood glucose allows you to make better choices about when and what to eat."