Malnutrition – Causes, Symptoms and Treatment
Malnutrition is a condition in which the body does not receive adequate or balanced nutrients, impairing overall health. It can result from both deficiency and excess of nutrients.
Wissenswertes über "Malnutrition"
Malnutrition is a condition in which the body does not receive adequate or balanced nutrients, impairing overall health. It can result from both deficiency and excess of nutrients.
What is Malnutrition?
Malnutrition refers to deficiencies, excesses, or imbalances in a person´s intake of energy and/or nutrients. It is a broad term that encompasses both undernutrition and overnutrition. Malnutrition affects people of all ages and is one of the most pressing global public health challenges, with millions affected worldwide in both low-income and high-income countries.
Forms of Malnutrition
- Undernutrition (Protein-Energy Malnutrition): Insufficient intake of calories and/or protein, commonly seen in developing countries and in patients with chronic illnesses.
- Micronutrient Deficiency: Lack of essential vitamins and minerals (e.g., vitamin D, iron, iodine) despite adequate caloric intake, sometimes called hidden hunger.
- Overnutrition: Excessive caloric intake leading to overweight, obesity, and associated chronic diseases.
- Disease-Related Malnutrition: Malnutrition occurring as a consequence of chronic illness, cancer, or major surgery.
Causes
Malnutrition can arise from a wide range of social, economic, and medical factors:
- Poverty and limited access to nutritious food
- Chronic diseases (e.g., cancer, inflammatory bowel disease, dementia)
- Swallowing difficulties or reduced appetite, especially in older adults
- Malabsorption disorders (e.g., celiac disease, Crohn's disease)
- Restrictive or unbalanced diets
- Alcohol or substance dependency
- Eating disorders such as anorexia nervosa or bulimia nervosa
- Food insecurity in crisis-affected regions
Symptoms
The symptoms of malnutrition vary depending on its type and severity:
- Unintentional weight loss and muscle wasting
- Fatigue, weakness, and difficulty concentrating
- Weakened immune system and increased susceptibility to infections
- Stunted growth and developmental delays in children
- Dry skin, brittle nails, and hair loss
- Edema (fluid retention in tissues) in cases of severe protein deficiency
- Impaired wound healing and bone loss
Diagnosis
Malnutrition is assessed using a combination of clinical tools and investigations:
- Screening Tools: Validated instruments such as the MNA (Mini Nutritional Assessment) and the NRS-2002 (Nutritional Risk Screening) are widely used in clinical settings.
- Anthropometric Measurements: Body Mass Index (BMI), weight history, skinfold thickness, and muscle mass assessment.
- Laboratory Tests: Blood tests measuring albumin, prealbumin, hemoglobin, vitamins, and trace elements.
- Dietary History: Detailed assessment of eating habits, food intake, and any dietary restrictions or intolerances.
Treatment
Treatment of malnutrition is tailored to the underlying cause and the degree of nutritional depletion:
Nutritional Therapy
The first step is usually to improve nutrient intake through a personalized, nutrient-dense diet developed in collaboration with a registered dietitian.
Oral Nutritional Supplements
When dietary intake alone is insufficient, high-calorie oral nutritional supplements (e.g., Ensure, Fresubin) or targeted micronutrient supplements may be prescribed.
Enteral Nutrition
If oral intake is not possible or adequate, nutrients can be delivered via a nasogastric tube or a PEG tube (percutaneous endoscopic gastrostomy) directly into the stomach or intestine.
Parenteral Nutrition
In severe cases or when the gastrointestinal tract is not functional, nutrition is administered intravenously – this is known as parenteral nutrition.
Treatment of Underlying Conditions
Addressing the root cause of malnutrition is essential for sustained recovery and long-term nutritional health.
At-Risk Groups
Certain populations are at particular risk of developing malnutrition:
- Older adults (aged 65 and above)
- Pregnant and breastfeeding women
- Infants and young children
- People with chronic or severe illnesses
- Individuals with low socioeconomic status
- Hospitalized patients and nursing home residents
Prevention
Early identification and timely intervention are key to preventing malnutrition. Regular nutritional screening in clinical settings, access to dietary counseling, and broader public health strategies to combat poverty and food insecurity all play an important role.
References
- World Health Organization (WHO): Malnutrition – Key facts. WHO Fact Sheet, 2024. https://www.who.int/news-room/fact-sheets/detail/malnutrition
- Cederholm T et al.: GLIM criteria for the diagnosis of malnutrition – A consensus report from the global clinical nutrition community. Clinical Nutrition, 2019; 38(1):1–9. https://doi.org/10.1016/j.clnu.2018.08.002
- Saunders J, Smith T: Malnutrition: causes and consequences. Clinical Medicine, 2010; 10(6):624–627. https://doi.org/10.7861/clinmedicine.10-6-624
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Related search terms: Malnutrition + Malnourishment + Undernutrition + Nutritional deficiency