Supports Memory, Learning & Focus Aids Healthy Cortisol Levels Dietary Supplement GMP - Good Manufacturing Practices - Produced in a Certified Facility Phosphatidylserine (PS) is a naturally occurring phospholipid in the brain that has an important impact on specific neurotransmitters including acetylcholine, serotonin, norepinephrine and dopamine. Numerous clinical studies have indicated that 300mg of PS taken daily demonstrated positive support on attention, concentration, focus and memory. Vital brain nutrient. With Vitamin C protection. Same material used in human clinicals.