Glutamine dipeptide products in PN admixtures improve which properties?

• A. Water solubility
• B. Stability during heat sterilization
• C. Shelf life
• D. Water solubility, stability during heat sterilization, and shelf life

Answer: (D)

Glutamine dipeptide products in PN admixtures are used because the dipeptide form is more favorable for glutamine’s behavior in solution. The dipeptide is more water-soluble than free glutamine, which helps prevent precipitation and allows higher, more reliable dosing in parenteral nutrition. It is also more chemically stable under the heat sterilization conditions used for PN admixtures, reducing degradation during autoclaving. This combination of better solubility and greater heat stability leads to a longer shelf life, since the glutamine remains intact and usable for a longer period during storage and use. Therefore, the improvement spans water solubility, stability during heat sterilization, and shelf life.