Phosphatidylserine is a glycerophospholipid consisting of two fatty acid molecules bonded to a glycerol molecule and an ethanolamine phosphate molecule. Present mainly in the central nervous system and in the brain, phosphatidylserine plays a primary role in cell membranes (especially neurons), regulating their integrity and permeability. There are several beneficial properties attributed to this substance: it seems to be able to increase the growth of muscle mass, to improve memory and cognitive performance in both elderly and younger subjects, to keep the nervous system healthy. and improve the conduction of nerve impulses, to promote concentration and resistance to stress and improve mental performance in case of stress and to improve symptoms of depression.