Used as a biomarker for dopamine metabolism in neurological research, helping assess dopaminergic activity in conditions like Parkinson’s disease. It is also employed in studies related to oxidative stress and neurodegeneration due to its role as a major metabolite of dopamine. In analytical chemistry, it serves as a reference standard in HPLC and mass spectrometry for quantifying catecholamine levels in biological samples. Additionally, it has been investigated for its antioxidant properties and potential neuroprotective effects.