Nearly every single part of our body is made of living cells. And it's these cells that help us see, breathe, feel, think and much more. ＿＿（46）＿＿ their jobs in the body may differ, one thing all these cells have in common is that they need energy to survive and perform their duties. Cells need to turn nutrients in our diet into a form of energy that they can use, and the process starts with glucose. Glucose is the basic fuel that powers every single one of our cells. If we eat or drink things that are high in glucose, the glucose gets absorbed straight into our blood ready for our cells to use. If a starchy food is 47 the menu, the enzymes in our saliva and digestive juices break it down and convert it into glucose. And if for some reason there's no carbohydrate in our diet, cells can turn fat and protein into glucose as a last ＿＿（48）＿＿ , because they need glucose to survive. It's here that sugar and cancer start to ＿＿（49）＿＿ , because cancer is a disease of cells. Cancer cells usually grow quickly, ＿＿（50）＿＿ at a fast rate, which takes a lot of energy. This means they need lots of glucose. All our healthy cells need glucose too, and there's no way of telling our bodies to let healthy cells have the glucose they need, but not give it to cancer cells.