“…ROS can damage cellular membranes, lipids, nucleic acids, proteins, and enzymes [1][2][3][4][5]. Oxidative stress may enhance the aging process [6,7] and can trigger various diseases [8,9], Article Related Abbreviations: 3-NT, 3-nitro-L-tyrosine; 8-IP, 8-isoprostane; 8-OHdG, 8-hydroxy-2 ′ -deoxyguanosine; IS, internal standard; MRM, multiple reaction monitoring; ROS, reactive oxygen species including inflammation [10], cancers [11][12][13], cardiovascular disease [9,14], essential hypertension [15], chronic obstructive pulmonary disease [16], skin fibrosis [17], diabetes [18], neurodegenerative diseases [19], and Alzheimer's disease [20]. Early diagnosis of these conditions is crucial in maintaining human health and for successful therapy, indicating a need to reliably and quantitatively measure biomarkers of oxidative stress.…”