NGF and dementia: Cerebrolysin is a mixture of porcine-derived neuropeptides and free amino acids, including nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), ciliary neurotrophic factor (CNTF), enkephalins, orexin, and P21 [41,42], approved for use as a treatment for dementia [43], stroke [44], and traumatic brain injury (TBI) [45].