The cells of your brain are sheathed and protected from damage by an outer membrane that is full of an important fatty substance called phosphatidylserine or PS. We don't get PS from food; rather our bodies intuitively make the right amount to keep brain cells healthy-at least during the beginning to mid stages of life. There comes a point in time when production of it declines, and the unwanted results can manifest as a foggy memory and mood changes. PS supplements have been clinically proven to improve age-related mental decline, and the dosage used in many of the well-documented studies is 300 mg - the precise amount in just one capsule of Swanson Ultra Triple Strength Phosphatidylserine.