Cellsome®-Natural Phosphatidylserine (PS) extract catalog is composed of four liposomes made from phosphatidylserine (PS) lipids that are made from natural lipids that are extracted from either brain or soybean. Adding 30% cholesterol makes the liposomes serum stable and is necessary when the liposomes are used in the presence of serum.

These liposomes are all anionic due to the negative charge of phosphatidylserine.

Brain phosphatidylserine (PS) is composed of both saturated and unsaturated lipids. Brain PS contains much larger percentage of saturated lipids compare to Soy PS. Brain PS is mainly composed of four lipids: 42% of 18:0 lipid, 30% of 18:1 lipid, 2% of 20:4 lipid and 11% of 22:6 lipid.

Soy PS is composed of both saturated and unsaturated lipids. Soy PS contains more unsaturated lipids. Soy PC is mainly composed of 5 lipids: 10% of 16:0 lipid, 3% of 18:0 lipid, 12% of 18:1 lipid, 68% of 18:2 lipid, and 7% of 18:3 lipid.