Phosphatidylserine Phosphatidylserine (PS) is a natural phospholipid that is an essential componentof cell membranes. PS promotes brainfunction by increasing neuronal membrane fluidity (cell-to-cell communication), resulting in improved cognition. Also, PS protects against stress by mitigating the actions of cortisol (catabolic stress hormone.) Cogni-PS" is a concentrated form of phosphatidylserine derived from an enzymatic process of soy phospholipids. Take 1 - 3 capsules or 1 softgel daily with food, or as directed by your qualified health consultant. Best kept refrigerated. Keep out of the reach of children Ingredients: Soybean oil. Softgel consists of gelatin, glycerin and water. PS-100 is from 500 mg of mixed phospholipids in a base of soybean oil. Contains no common allergen.