Used in neuroscience and biomedical research to quantify levels of 3-methoxy-4-hydroxyphenylglycol (MHPG), a major metabolite of norepinephrine, in biological samples such as plasma, serum, or cerebrospinal fluid. The kit enables researchers to assess noradrenergic activity in the central and peripheral nervous systems. It is commonly applied in studies related to depression, anxiety, schizophrenia, PTSD, and neurodegenerative disorders. The ELISA format allows for high sensitivity and specificity, making it suitable for clinical and preclinical investigations into stress responses, psychiatric conditions, and the effects of psychoactive drugs.