The amount of phosphotidylcholine in the Liposomal products is not standardized. It will vary from lot to lot. However, the total amount of the phospholipid complex is listed on the label.
The purpose of the phospholipid complex in the liposomals is only to create the liposomes for optimal absorption of the nutrient its attached to. For example, for the Optimal Liposomal Vitamin C, the vitamin C is the main functional nutrient, and the phospholipids are there to encase the vitamin C into microscopic liposomes. For more information on liposomals, please see this article: http://education.seekinghealth.com/supplement-delivery-methods-whats-best
Please note: For the Optimal PC products, the amount of phosphatidylcholine is at least 12% for the liquid, and 15% for the softgels.