Phosphatidylserine (PS) is a phospholipid nutrient found in the brain that may improve cognitive ability. The Brain Sharpener is the perfect brain food. It is the student's best help in taking exams. It is a dietary supplement for healthy brain function, neurological well being, memory restoration, general well being, and energy. There is no sugar, lactose, artificial color, artificial flavor, additives, preservatives or yeast.