So, whereas carbohydrate storages are used up after about 24 hours so a day, fat storage can actually help sustain the processes of our cells in our body for several weeks. And that's because it makes up the predominant portion of the total energy that is readily available to the cells of our body. So we have 420,000 kilojoules of energy that is stored in triglyceride. So what that basically means is when we run out of these two storages of energy, our body will begin to break down the triglycerides to form the high energy ATP molecules. And that will last us several weeks. And after we run out of our triglyceride storages, that's when our body begins to actually break down the protein, the muscles of our body, for energy.