Can trace element testing detect malnutrition?

Trace element testing usually cannot directly diagnose malnutrition, but it can serve as an auxiliary method.

Trace element testing primarily assesses the status of micronutrients in the body, such as levels of iron, zinc, copper, selenium, and other elements. When the body lacks certain trace elements—for example, iron-deficiency anemia or zinc deficiency—trace element testing can show levels below the normal range, thus indicating possible malnutrition. For example, low serum iron concentration may indicate iron-deficiency anemia, while low serum zinc concentration may be associated with decreased immune function.

Although trace element testing is somewhat significant for assessing nutritional status, relying solely on one test result to determine whether malnutrition exists is inaccurate. The diagnosis of malnutrition requires a comprehensive evaluation of multiple factors, including weight changes, dietary intake, physical measurements, clinical symptoms, and biochemical tests.

It is recommended to undergo regular comprehensive nutritional assessments. Meanwhile, attention should be given to maintaining a balanced diet, ensuring adequate intake of proteins, fats, carbohydrates, vitamins, and minerals to meet the body's needs.