What is Metabolism?


Metabolism is a complex process that breaks down food and drink into energy to build and repair our bodies. This is accomplished with thousands of chemical reactions inside our bodies. It provides us with essential nutrients and energy to function properly. The amount of energy we burn depends on how much food we consume. It is also responsible for the amount of energy we produce. Food and drink undergo catabolism, a process that converts them into energy.

Metabolic pathways

A metabolic pathway is a linked series of chemical reactions inside a cell. These reactions produce products, reactants, intermediates, and other compounds known as metabolites. Enzymes are responsible for catalyzing these reactions. The pathways are essential to the functioning of cells and organ systems.

These pathways include reactions involving enzymes and compounds from multiple organisms. They are considered chimeric pathways because they are not expected to occur entirely within a single organism. EC numbers appear in blue.


Enzymes in metabolism play important roles in digestion and the production of many cellular constituents. They break down large nutrient molecules and guide them through the digestive tract into the bloodstream. They also perform numerous other functions. These enzymes are essential to life. In the case of carbohydrates, they break down the sugar sucrose into glucose and fructose.

Enzymes are proteins with specific sites to recognize and alter certain reactants. This reduces the activation energy required for the reaction. The active site of an enzyme is an aperture in the molecule where the substrate binds. Enzymes are involved in various biochemical reactions, including electron transfers, rearrangements, condensation, and cleavage. These enzymes also participate in feedback mechanisms that allow cells to conserve energy.


The process of catabolism in metabolism includes a series of reactions that produce and consume energy. The main product of this process is ATP, the energy carrier of living cells. In addition, catabolism produces the building blocks for new compounds required for cellular life. For example, nitrogen-fixing bacteria break down atmospheric nitrogen to ammonia, a water-soluble form that plants use for energy. Catabolism also produces pyruvate molecules, which the body uses to produce cellular energy.

Catabolism also releases energy by breaking down the carbon skeleton of amino acids. This energy is used to build new glucose, which cells use as energy. In addition, cellular proteins are broken down and stored in large molecules during times of starvation. This allows organisms to survive on tissues for long periods, even without food. Additionally, it makes them more resistant to changes in the environment.


Genetics and metabolism is a peer-reviewed academic journal published by the Academic Press. It is the official journal of the Society for Inherited Metabolic Disorders. The journal studies inherited metabolic disorders, including metabolic syndromes and diabetes. It is an important journal for researchers who are interested in inherited disorders and the causes of them.

Genetics and metabolism studies have provided valuable insights into basic biological processes and assisted in diagnosing several diseases. Molecular Genetics and Metabolism also publish peer-reviewed articles using molecular and biochemical genetic techniques. Letters to the editor are also welcome.


Diet and metabolism interact with each other and affect many health outcomes. Depending on the amount and composition of nutrients in the diet, metabolism can change and affect an individual’s health. Insufficient dietary intake can lead to metabolic disease. Furthermore, the relationship between diet and metabolism is complicated and can affect various factors.


Many factors can affect our metabolism, and stress is a major one. Chronic stress increases the amount of cortisol in the body, a hormone that increases our appetite and impairs our sleep. Managing cortisol levels is crucial to controlling our metabolic rate and maintaining our desired weight. Elevated stress has also been linked to insulin resistance, which makes it harder for the body to burn fat.

Many people who struggle with their weight have an underlying problem. This problem may result from a high-stress level or even depression. For these individuals, there is a solution. BetterHelp offers online counselling to help them deal with stress and improve their health. They can also learn how to manage stress and improve their eating habits.

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