“In schizophrenic patients who abused not only cannabis , but also additional substances, NGF concentrations were as high as 2336.2 ± 1711.4 pg/ml (n = 12).”
“Schizophrenic patients with regular cannabis intake (> 0.5 g on average per day for at least 2 years) had significantly raised NGF serum levels of 412.9 ± 288.4 pg/ml (n = 21) compared to controls and schizophrenic patients not consuming cannabis (p < 0.001).”