Phosphatidylserine (PS) is an essential component of healthy nerve cell membranes, and is an especially important part of the membranes of brain cells.1 Supplemental PS crosses the blood-brain barrier and supports optimal structure and function of brain cells. In this way, phosphatidylserine promotes healthy memory, focus, attention, concentration and cognition.2 Clinical trials have demonstrated that PS supplementation can support cognitive performance, as well as memory and attention.3,4