Which body mass index (BMI) category in adults is indicative of malnutrition?

Body Mass Index (BMI) is a standardized screening tool that correlates body weight with height to estimate adiposity and nutritional risk. A value below the healthy threshold suggests protein-energy malnutrition or underlying wasting diseases. This category is associated with increased risks of impaired wound healing, sarcopenia, and compromised immune function. A. 25.0 to 29.9 kg/m2: This range is classified as the "Overweight" category for adults. While it may carry risks for metabolic syndrome or cardiovascular disease, it does not indicate malnutrition in terms of caloric or protein deficiency. It represents a surplus of body mass relative to height. B. <18.5 kg/m2: A BMI of less than 18.5 is the internationally recognized threshold for "Underweight." In a clinical nutritional assessment, this finding is a primary indicator of potential malnutrition. It necessitates further evaluation of dietary intake and screening for malabsorption or systemic illness. C. 18.5 to 24.9 kg/m2: This is the "Normal" or "Healthy Weight" range for the majority of the adult population. It indicates that the individual's weight is appropriate for their height, posing the lowest risk for weight-related health problems. It is the target range for optimal nutritional status. D. 30.0 to 39.9 kg/m2: This range identifies "Obesity" (Classes I and II). While an individual in this category can suffer from micronutrient deficiencies, the BMI itself indicates an excess of body mass rather than the depletion associated with clinical malnutrition.