“…In this sense, the connection between gut microbiota and metal(-loid)s has been explored in mice after arsenic [31][32][33][34][35][36], mercury [37][38][39], copper [38,40], cadmium [41][42][43][44][45], lead [40,41,46,47], iodine [48] and selenium [17,18,49] exposure. Rats have been used as model organisms to assess the interaction of gut microbiota with arsenic [50,51], mercury [52], copper [53,54], cadmium [50,52], iodine [55], manganese [56], lead [57,58], and selenium [59]. Human gut microbiota have been linked to arsenic [60][61][62], mercury [63,64], heavy metals [57,58] and lead [65].…”