What is Alpha-GPC Alpha-GPC or L-Alpha Glycerylphosphorylcholine is a phospholipid precursor and metabolite that comes from soy lecithin. What happens if you don’t have enough Choline Deficiencies in acetylcholine can cause the body to break down phosphatidylcholine for its choline content, leading to the death of brain cells.nbsp It protects cells of the brain and other organs from damage, shielding a range of important biomolecules against toxin build-up. How to Take it It is suggested to take 500mg 2-3 times a day.