Glucose and fructose are simple sugars or monosaccharides. Monosaccharides are the simplest form of carbohydrates and can be combined to form more complex carbohydrates like disaccharides and polysaccharides. Examples of disaccharides and polysaccharides are sucrose (table sugar), lactose (milk sugar) and starch.

Simple sugars and starches are both carbohydrates, and both contain the molecule glucose, which is also called blood sugar. Glucose is a very important biological molecule, as it is the brain's primary source of energy and a significant source of energy for all body cells.

Eating big meals can cause your blood sugar levels to increase dramatically. If you are otherwise healthy, your body has a system to quickly usher the blood sugar out of your blood and into the cells where it belongs.

Your cells require glucose, a simple sugar, to keep your heart beating, your muscles pumping, and otherwise support everything your body does. You obtain glucose from the carbohydrates you eat; even complex carbohydrates can be broken down to simple sugars.

Whether you’ve been diagnosed with diabetes or you simply struggle with unstable blood-sugar levels, you can probably identify when your glucose level gets too low. Common symptoms of low-blood sugar include anxiety, dizziness, weakness, fatigue, sweating and headaches.

The body maintains very narrow normal ranges of BUN, creatinine and glucose in the blood. BUN, or blood urea nitrogen, and creatinine form when the body metabolizes protein from foods. Glucose, a sugar, serves as a source of energy for the body and comes from foods that contain carbohydrates.

While eating peanut butter is not a treatment for high blood sugar, including natural peanut butter in a healthy diet may help lower and stabilize your overall blood sugar levels. It may also help prevent blood sugar spikes. This is good news, especially if you have diabetes or a risk of diabetes.