Economy Size Non-GMO Soy-Free Supports Brain Health Sharp-PS Green Dietary Supplement Healthy Origins Sunflower PS featuring Sharp-PS Green is a unique, soy-free source of phosphatidylserine derived from European, Non-GMO sunflower lecithin. Phosphatidylserine is a phospholipid compound found naturally in brain cell membranes, however, with advancing age, our natural phosphatidylserine levels can diminish, which may impact our cognitive abilities. Unfortunately, obtaining significant amounts of phosphatidylserine through our diet has proven to be quite difficult. This is why many individuals have chosen to take phosphatidylserine supplements. Supplementation with phosphatidylserine may help to replenish depressed levels of phosphatidylserine, enhance cognitive focus, nourish brain cell membranes and support healthy cognitive function.