Phospholipids are indispensable for the live organisms and play an essential role for both health and nutrition due to a great variety of different functions.
They also prove to be perfect base substances for cosmetic products. Probably the main ingredient is the Phosphatidycholine which penetrates the adipocyte through the double lipid layer, acting as an emulsifying/tensoactive agent. The physical-chemical characteristics of the stored lipids would therefore be altered, making them water soluble.
This would permit their elimination due to their non-compatibility with the material stored in the adipocyte which is liposoluble.