Supports Healthy Cognitive Function Soy-Free Cogni-PS Phosphatidylserine Dietary SupplementPhosphatidylserine (PS) is a naturally-occurring phospholipid and is a component of cell membranes. Phosphatidylserine is the most abundant phospholipid present in the brain and supports healthy cognitive function. Jarrow Formulas Cogni-PS is a concentrated form of phosphatidylserine from sunflower lecithin that offers superior stability, does not contain soy and is not derived from genetically modified organisms (non-GMO).