NOW&ampreg; Phosphatidyl Serine is a phospholipid compound derived from soy lecithin that plays an essential role in cell membrane composition and intercellular communication. Phosphatidyl Serine is a major structural component of neural membranes where it assists in the conduction of electrical impulses and facilitates the activity of neurotransmitters involved in learning, memory, and mood. These properties make NOW&ampreg; Phosphatidyl Serine an ideal supplement for the support of cognitive function.* From the FDA's website: "Consumption of phosphatidyl serine may reduce the risk of dementia in the elderly. Very limited and preliminary scientific research suggests that phosphatidyl serine may reduce the risk of dementia in the elderly.&ampnbsp; FDA concludes that there is little scientific evidence supporting this claim.