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Metabolic Disorders
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Metabolic Problems

Metabolic Disorders

Metabolic disorders occur when abnormal chemical reactions in the body disrupt the process of converting food into energy.

Understanding Metabolism

Metabolism is the process your body uses to get or make energy from the food you eat. Food is made up of proteins, carbohydrates, and fats. Chemicals in your digestive system break the food parts down into sugars and acids, your body's fuel. Your body can use this fuel right away, or it can store the energy in your body tissues, such as your liver, muscles, and body fat.

What is a Metabolic Disorder?

A metabolic disorder occurs when abnormal chemical reactions in your body disrupt this process. When this happens, you might have too much of some substances or too little of other ones that you need to stay healthy. There are different groups of disorders. Some affect the breakdown of amino acids, carbohydrates, or lipids. Another group, mitochondrial diseases, affects the parts of the cells that produce the energy.

You can develop a metabolic disorder when some organs, such as your liver or pancreas, become diseased or do not function normally. Diabetes is an example.

Frequently Asked Questions

Management is highly individualized, but common strategies include: maintaining a balanced diet with controlled carbohydrate intake, avoiding fasting periods longer than 4–6 hours, staying hydrated, limiting alcohol, and following any prescribed low‑protein or low‑fat regimens. Regular exercise, weight monitoring, and taking prescribed supplements (e.g., riboflavin for certain mitochondrial diseases) also improve outcomes.
Seek immediate care if you develop severe vomiting, confusion, seizures, rapid breathing, unexplained coma, or a sudden drop in blood sugar (<70 mg/dL) that does not improve with oral glucose. These can signal a life‑threatening metabolic decompensation that needs IV fluids, glucose, and possibly specific antidotes.
Early clues can include unexplained fatigue, frequent low blood‑sugar episodes, sudden weight loss or gain, persistent nausea, muscle weakness, or unusual skin changes such as a yellowish tint. If these symptoms appear together or worsen, ask your doctor for metabolic screening labs (e.g., fasting glucose, lipid panel, liver enzymes, ammonia, lactate).
Diagnosis usually starts with a detailed history and physical exam, followed by blood and urine tests that measure glucose, amino acids, organic acids, lactate, ammonia, and specific enzyme activities. In some cases, imaging (MRI of the brain or liver) or a muscle/skin biopsy for mitochondrial studies is ordered. Genetic testing (single‑gene panels or exome sequencing) confirms many inherited forms.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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