O-Toluic acid (OTA) and m-toluic acid (MTA) are two isomers of toluic acid that act as an important organic intermediates, mostly used in medicines and pesticides. The aim of the study was to evaluate the impact of biofield energy treatment on isotopic abundance ratios of 2H/1H, 13C/12C, (PM+1)/PM and 18O/16O, (PM+2)/PM, in toluic acid isomers using gas chromatography-mass spectrometry (GC-MS). The OTA and MTA samples were divided into two parts: control and treated. The control sample remained as untreated, while the treated sample was further divided into four groups as T1, T2, T3, and T4. The treated group was subjected to biofield energy treatment. The GC-MS spectra of both the isomers showed five m/z peaks due to the molecular ion peak...