Healthy Origins, Sunflower PS Phosphatidylserine, 100 mg, 120 SoftgelsEconomy 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.