And so once we ingest these carbohydrates, our body breaks down these carbohydrates into their individual monomer sugars. And if this monomer sugar is not a glucose molecule, we typically transform that into a glucose molecule because it's the glucose that we use in the process of glycolysis and aerobic cellular respiration to basically produce the high energy ATP molecules that we use inside our body. And if we already have too many of these ATP molecules, if we have enough, the glucose can be stored in the form of glycogen for later use. So ultimately, what happens is that energy that is produced in the nuclear reactions is basically stored in these chemical bonds within these sugar molecules. And when we ingest these sugar molecules, we essentially take that same energy that came from the sun and store it in the ATP molecules and use those ATP molecules to carry out all the different types of processes that take place inside our cells. So we see that the first role that sugars play is basically energy storage and fuel source.