Phosphatidyl Serine (PS) is a critical component of nerve cell membranes where electrical impulses carry thoughts, feelings, and instruction to run the body and mind. PS plays a critical role in cognitive function, such as helping to maintain memory. Preliminary research suggests that PS may also help support a healthy stress response. Sourced from soy, Vegan True® Phosphatidyl Serine does not contain any animal products or animal-derived ingredients, making it an ideal PS source for vegans.*