Phosphatidylserine is an essential component of neuronal cell membranes. Supplementation with phosphatidylserine has been shown to optimize cognitive & adrenal function. Iso-Phos provides pure phosphatidylserine isolate from Fidia Research Labs, the Ita A woman who is pregnant or nursing, or who might become pregnant, should consult a health-care practitioner before using this product.1 capsule tid