Norashareena Mohamed Shakrin is a science officer and researcher at the Institute for Medical Research (IMR), National Institutes of Health, MOH Malaysia. Her research focuses on clinical biochemistry, inborn errors of metabolism, neurotransmitter disorders, metabolomics, and biomarker discovery. Her work involves the development and implementation of HPLC-based analytical methods for the biochemical diagnosis of rare metabolic disorders, including the establishment of reference intervals for neurotransmitter metabolites and the evaluation of novel diagnostic biomarkers.