Which of the following is not one of the nutritional status markers listed?

• A. Prealbumin
• B. Fibronectin
• C. Albumin
• D. Transferrin

Answer: (D)

In nutrition status assessment, the proteins used as markers are those that reflect protein-energy stores and synthesis. Albumin and prealbumin are classic examples: albumin reflects longer-term protein status, while prealbumin is more sensitive to recent changes because it has a shorter half-life. Transferrin, however, is primarily an iron-transport protein; its levels are strongly influenced by iron stores and inflammatory conditions, not by protein-energy intake alone. This makes it an unreliable standalone indicator of nutritional status in many clinical lists. Therefore, transferrin is the one that does not belong as a nutritional status marker in this context.