Of all brain and body cells, membranes are the main working surfaces.
Membranes are the fatty barriers that surround every cell and many structures within cells.
With age, the membranes tend to get stiffer and more resistant to the normal movement of molecules. Less movement of molecules means decreased function in brain cells. Nerve cells especially depend on membranes to carry out their specialized functions. PS not only aids in the conduction of nerve impulses, it also helps accumulate, store and release nerve transmitter substances. Generally 100 mg.