“…The direct mechanism by which this occurs remains unknown, however, it has been postulated that tetrahydrobiopterin (BH4) metabolism, a cofactor for the synthesis of monoamine neurotransmitters which has some structural similarities to folic acid, could be involved (Bottiglieri, 2005). It has been suggested that supplementation with B vitamins, in particular folic acid, could be a beneficial strategy for schizophrenic patients since they mainly attenuate the negative symptoms of the disorder (Moustafa et al, 2014).…”