L-arginine is a semi-essential amino acid that plays a central role in numerous metabolic and physiological processes. It serves as a precursor for nitric oxide (NO), a critical signaling molecule involved in vasodilation, immune regulation, and endothelial function. Arginine is also required for protein synthesis, creatine production, ammonia detoxification through the urea cycle, and the synthesis of polyamines that support cell growth and tissue repair. Because of these diverse functions, arginine availability directly influences cardiovascular health, immune responses, and metabolic balance.
In research settings, L-arginine is widely studied as a biomarker of endothelial function, nitric oxide bioavailability, and immune activation. Altered arginine levels have been associated with conditions such as cardiovascular disease, hypertension, metabolic syndrome, sepsis, and inflammatory disorders. Measurement of arginine is also relevant for studies examining nutritional status, muscle metabolism, and wound healing. Although this assay is for research use only, its application can help clarify mechanistic pathways and disease-related metabolic changes involving nitric oxide production and amino acid metabolism.
The assay enables quantitative determination of L-arginine in EDTA plasma, providing a reliable tool for investigating biochemical pathways, assessing metabolic disturbances, and supporting translational research in cardiovascular, immunological, and metabolic health.
This product is manufactured in USA by Immundiagnostik AG.


