Which value would need additional investigation?

• A. A Weight Increase of 1.5 kg in a Day
• B. A Serum Albumin of More Than 3.5 g/dL
• C. A Serum Hemoglobin of 11.7 g/dL
• D. A Prealbumin Level of 35 mg/dL

Answer: (B)

High serum albumin above the normal upper limit is the clue that prompts further investigation. Albumin reflects more than just nutrition; it’s influenced by hydration status and inflammatory processes. When the value exceeds about 3.5 g/dL, it isn’t typically a sign of malnutrition and should trigger review of fluid balance and lab validity. Dehydration or hemoconcentration can elevate albumin, so you’d want to assess the patient’s volume status, review recent fluid administration, check related labs (like hematocrit and BUN/creatinine), and consider repeating the test to confirm accuracy. In a critical-care nutrition context, this unexpected high value warrants investigation to determine whether it represents true physiology, a hydration issue, or a lab artifact.