Fat and protein can both be converted into glucose if necessary through a process called gluconeogenesis. The use of proteins or fat for gluconeogenesis requires more energy than the more straightforward metabolism of starches and sugar into glucose.
Your body utilizes a variety of compounds for energy, including fats, carbohydrates and proteins. Because your muscles sometimes need extra energy during strenuous workouts, they have small stores of glycogen, an substance rich in energy. Fat can...
Glucose is one of your body's preferred forms of energy. Some cells, such as brain cells, the cornea and lens in the eye and red blood cells, almost exclusively use glucose for fuel. The liver has an important role in regulating blood glucose...
Blood glucose homeostasis is an important biologic process that involves a variety of mechanisms. The muscles, kidneys and liver all have important functions in glucose regulation. The liver is especially important for its ability to store...
Dieters and nutrition-minded people often focus upon how harmful glucose is. While you can make a case that there is too much sugar in the the average American's diet, it is easy to forget that glucose is essential for life. This six-carbon sugar...
Each of the macronutrients -- carbohydrates, fat and protein -- can be used by your body as energy, or "burned." Carbohydrates are the preferred source of energy because they have the shortest path to glucose, which is the form of energy that any...
Digestible carbohydrates are not essential to the human diet. Humans could, in principle, survive on a diet consisting only of protein and fat. The main reason doctors recommend a diet moderate in good carbohydrates is that foods containing good...
Broadly speaking, you can divide metabolic pathways into two different categories: catabolic pathways, which break down larger molecules to release energy or provide starting materials for synthesis, and anabolic pathways, which synthesize larger...
Glucose is your body's primary source of energy. It plays a major role in the metabolism of carbohydrates, fats and proteins. Metabolism is the chemical process that converts your food into energy on the cellular level. The conversion from food...
Pyruvic acid, which is ionized to pyruvate in the human body, is produced when you break down glucose for energy while exercising. However, it is not simply a waste product of glucose breakdown. Rather, it plays a role in a variety of biological...
The food you eat tastes good and satisfies your senses, but it serves a much higher purpose: the provision of nutrients and energy necessary for life. To utilize the life-giving power of food, your body breaks it down into tiny molecules during...
Glucose is the form of sugar that circulates in your blood and provides energy to all the cells of your body. Glucose is the body's preferred energy source, and it is the only one your brain uses. It is easiest for your body to make glucose from...
Metformin, a medication used for treating diabetes and other insulin-resistant conditions, was first introduced in the United Kingdom more than 50 years ago. It was approved for use in the United States in 1995, and in 2009 it was one of only two...
If you eat more calories than you use, you will gain weight. Though the body prefers to use protein for body maintenance, protein can convert into glucose and ultimately fat. So taking protein supplements or eating foods high in protein can make...
According to the Centers for Disease Control and Prevention, as of 2007, approximately 23.6 million Americans had diabetes mellitus. This is equivalent to 7.8 percent of the total population of the United States. People who have diabetes type 1...
The liver is the heaviest and largest internal organ that is located in the upper right side quadrant of the abdomen. It is formed of specialized cells called hepatocytes that are arranged in layers around a network of channels and ducts inside...
Fructose is a sugar, closely related to glucose and found in table sugar, that plants make by taking up the sun's energy. This process, called photosynthesis, produces fructose as well as glucose. Humans can then eat plants to obtain fructose and...
Pyruvate carboxylase, or PC, is one of several enzymes involved with the body's metabolism. Enzymes are proteins responsible for chemically altering molecules for the body's use. Enzymes specific to metabolism transform nutrients into utilizable...
Glycogen is the storage form of carbohydrates and is found in the liver and muscles. It is readily converted to glucose to be used as an immediate energy source, especially during vigorous or continuous exercise, such as a marathon. Sinse glycogen...
Glucose is a sugar that comes from the breakdown of all carbohydrates in the diet. Among other functions, glucose is a vital part of brain function as it is the only fuel that your brain can use. If you are consuming a low-carbohydrate diet, you...
Corosolic acid is an organic compound that is classified as a triterpene because its molecular scaffold contains 30 carbon atoms. It occurs naturally in the leaves of a deciduous tree called Crepe Myrtle that flourishes in tropical climates....
Vitamins are essential compounds required for a variety of purposes in the body, but they contain no calories and are not a source of direct energy. However, some vitamins, mainly the B-complex group, play important roles in reducing food into...
Glucose and fructose are both chemically classified as monosaccharides, meaning they are single sugar units. They taste sweet, are common in foods -- both are constituents of sucrose, or table sugar -- and provide energy to cells. While the body...
Glucose fuels your cellular powerhouses, providing the energy needed for your mental and physical functions. Your liver performs several critical roles in glucose metabolism, including sugar storage, release and production. Your liver's roles in...
Muscle synthesis is a complex science involving multiple signals and hormones that trigger the growth of muscle fibers. The skeletal muscles are made out of thousands of cylindrical protein-filled muscle fibers bound together by fibrous connective...
When your muscles can't get enough oxygen during a short burst of exercise, they start to make use of a pathway called lactic acid fermentation, which generates a small three-carbon compound called lactic acid or lactate as a byproduct of glucose...
Carbohydrates in your diet are a main source of glucose, a substance you need to produce cellular energy. Your liver stores and manufactures glucose, while you brain relies on glucose to function. If you don't get enough carbs, your liver will...
Your body can store glucose, or blood sugar, and fat but not amino acids, the main component of protein. If you consume an excessive amount of protein, starve yourself or suffer from a metabolic disease that consumes excess nutrients, your liver...
Biotin is a B-vitamin complex. It may not be a very well-known B vitamin, but it is necessary nonetheless. Biotin interacts with protein, fat and carbohydrates for the breakdown of nutrients and synthesis of energy. A biotin deficiency is quite...
