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Nutritional Status - Definition and Assessment

Nutritional status describes the condition of a person's nutrient supply. It indicates whether the body is adequately provided with energy, vitamins, and minerals for optimal health.

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Things worth knowing about "Nutritional status"

Nutritional status describes the condition of a person's nutrient supply. It indicates whether the body is adequately provided with energy, vitamins, and minerals for optimal health.

What is Nutritional Status?

Nutritional status refers to the condition of the body in relation to the intake and utilization of nutrients. It reflects the balance between nutrient supply through the diet and the actual requirements of the body. An optimal nutritional status is essential for good health, physical and mental performance, and overall well-being.

Importance of Nutritional Status

Nutritional status has a profound impact on virtually all bodily functions. It influences immune defense, wound healing, cognitive performance, body weight, and the risk of numerous chronic diseases. In clinical medicine, assessing nutritional status is particularly important because malnutrition can worsen disease outcomes and delay recovery.

Factors Influencing Nutritional Status

A wide range of factors can affect a person's nutritional status:

Dietary habits: Daily food choices and portion sizes
Digestion and absorption: The ability of the intestine to absorb nutrients effectively
Metabolic disorders: Conditions such as diabetes or thyroid dysfunction
Chronic diseases: Cancer, kidney disease, or heart failure can increase nutrient requirements
Medications: Certain drugs can impair nutrient absorption
Age: Older adults are at increased risk of malnutrition
Socioeconomic factors: Income, education, and access to food

Assessment of Nutritional Status

In clinical practice, nutritional status is evaluated using various methods:

Anthropometric Measurements

These include body weight, height, Body Mass Index (BMI), waist circumference, and skinfold thickness measurements to estimate body fat percentage.

Laboratory Tests

Blood tests provide key information about nutrient levels, such as albumin and prealbumin as markers of protein status, as well as concentrations of vitamins, minerals, and trace elements.

Dietary History

A structured dietary interview collects information on eating habits, food preferences, changes in appetite, and possible food intolerances.

Screening Tools

Standardized questionnaires such as the Nutritional Risk Screening (NRS-2002) and the Mini Nutritional Assessment (MNA) help to identify patients at increased risk of malnutrition at an early stage.

Possible Deviations from Normal

Nutritional status can deviate from the norm in two directions:

Undernutrition / Malnutrition: Insufficient intake of energy or specific nutrients, commonly seen in chronically ill patients, older adults, or populations with limited food access
Overnutrition / Obesity: Excessive energy intake leads to fat accumulation and increases the risk of conditions such as type 2 diabetes, hypertension, and cardiovascular disease

Improving Nutritional Status

Depending on individual assessment findings, various measures can be taken to optimize nutritional status:

Nutritional counseling by qualified dietitians or nutrition medicine specialists
Dietary adjustments tailored to individual needs (e.g., high-protein diet in cases of malnutrition)
Supplementation with nutrients or dietary supplements when a deficiency is confirmed
Clinical nutrition support (enteral or parenteral nutrition) in cases of severe malnutrition
Treatment of underlying conditions that impair nutritional status

References

Kondrup J. et al.: ESPEN Guidelines for Nutrition Screening 2002. Clinical Nutrition, 22(4): 415-421 (2003). PubMed PMID: 12880610
World Health Organization (WHO): Nutrition. Available at: www.who.int/health-topics/nutrition (2024)
Cederholm T. et al.: GLIM criteria for the diagnosis of malnutrition - A consensus report from the global clinical nutrition community. Clinical Nutrition, 38(1): 1-9 (2019). PubMed PMID: 30181091

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