Nanoparticles are spherical bodies which are covered with a monolayer of phosphatidylcholine.
The inside of the nanoparticles normally consists of an oil compatible with skin, which is able to take up lipid soluble active agents.
Dispersions of nanoparticles are cloudy to milky fluids and closely related to natural milk.
Nanoparticles are used in preparations for skin care, prevention and dermatology.
Nanoparticles are only visible under the electron microscope. Like liposomes nanoparticles transport active agents into the horny layer.
More information: Precious load - transport of active agents, Kosmetik International 2006 (7), 57-61.