BDNF and neurodevelopmental disorder: The determination of BDNF in human urine could also be used as a “potential” effect biomarker in human biomonitoring studies that attempt to establish the relationship between exposure to pollutants of interest and human health, such as those that seek to elucidate the relationship between some environmental exposures and neurodevelopmental disorders (Perera et al., 2015; Mustieles et al., 2020, 2022; Rodríguez-Carrillo et al., 2022a,b).