The DNA molecule contains a lot of chemical structures that tell the ribosomes how to create new proteins (that have a lot of functions).
Plus, you can benefit from fat burning even after your run as your body keeps burning fat for 2 to 3 hours after finishing a run. If you want to shed a few pounds, make sure you only ingest liquids and maybe a little protein during that time frame. Training on an empty stomach.
When trying to determine how much fuel to take in before a long run (longer than 75 minutes) begins, the general rule is to consume approximately 0.5 grams of carbohydrate for every pound of body weight and then multiply that number by the number of hours you have before you will begin your run.