Source Naturals, Phosphatidyl Serine Matrix, 60 SoftgelsDietary Supplement Supports Memory and Cognition 500 mg PhosphatidylSerine is a nutrient essential to the brain's structure and function. As a nerve cell building block, PhosphatidylSerine works in concert with omega 3 and other fatty acids to support healthy cognitive function including memory, learning, comprehension, and word recall. Sharp PS softgels use a unique encapsulation method that helps ensure long shelf life and optimum potency.