Little-known growth factor enhances memory, prevents forgetting in rats, January 26, 2011 News Release - National Institutes of Health (NIH)

The growth factor involved is IGF2 and it passes the blood brain barrier.

Risk factors: Alzheimer's : Autism : Bipolar disorder : Childhood obesity: Chronic fatigue: Multiple sclerosis Parkinson's disease Schizophrenia Kegg pathways Alzheimer's Parkinson's Schizophrenia Herpes simplex infection Cystic fibrosis CFTR interactome