Natural Factors PS-IQ Memory - Provides optimal brain nutrition by synergistically combining phospholipids such as PS derived from lecithin, with essential fatty acids, such as DHA derived from fish oil, to provide the brain with powerful nutritional support. PS (Phosphatidylserine) is a fat-soluble enzyme found to concentrate in brain tissue and helps to build and maintain healthy nerve cells. DHA is the essential fatty acid required by the brain to preserve mental alertness and memory retention, and regulate moods and some visual problems. Together, Natural Factors PS IQ works synergistically to help maintain optimal brain function.