Phosphatidylserine (PS) is a phospholipid that contains both an amino acid and fatty acids that are critical to the maintenance of cellular function, and is particularly concentrated in the brain. PS helps to keep heartbeat coordination, hormone secretion, and memory-related pathways functioning smoothly. Research indicates that when PS levels naturally decline with age, so do the abilities to learn, remember, and stay alert. PS helps support healthy brain and cellular function throughout the aging process. *