Development of modern quality criteria for a glutamine-containing dietary supplement

Abstract

The rapid expansion of the dietary supplement (DS) market and growing consumer interest in preventive healthcare have increased the demand for reliable quality assurance of products containing biologically active substances. LGlutamine, a conditionally essential amino acid, plays a key role in protein metabolism, energy balance, immune function, and maintenance of the gastrointestinal barrier. Despite its widespread application in dietary supplements, variability in raw materials, dosage accuracy, stability, and analytical control methods remains a significant issue, potentially affecting product efficacy and safety.