Natural Brain Enhancers with AlphaSize® and SerinAid® from Doctor's Best® features GPC and PS. GPC (GlyceroPhosphoCholine) and PS (PhosphatidylSerine) are phospholipid nutrients intensively researched for their benefits to diverse human brain functions. These nutrients naturally complement each other. GPC reaches very high concentration inside cells. PS is a building block for cell membranes that generate the brain's energy and electricity. Together they support attention, learning, memory and cognitive function. Natural Brain Enhancers assists the brain and body in coping with stress and facilitates growth factor action for brain circuit renewal. Numerous double-blind trials catalog the benefits of GPC and PS for people of all ages.