Alpha Gpc L-Alpha glycerylphosphorylcholine (alpha-GPC, choline alfoscerate) is a naturalcholine compound found in the brain and in milk. It is also a parasympathomimeticacetylcholine precursor which may have potential for the treatment of Alzheimer’s disease and dementia. Alpha-GPC is also used as a nootropic dietary supplement to enhance memory and cognition.
20g Alpha GPC
 - http://jissn.biomedcentral.com/articles/10.1186/1550-2783-5-S1-P15
 - http://www.ncbi.nlm.nih.gov/pubmed/11041281