Solid lipid nanoparticles (SLN) were developed at the beginning of the 1990’s based on the concept of solid particles, emulsions and liposomes. They are produced by exchanging the oil in an emulsion by a solid lipid, resulting in lipid nanoparticles being solid at both room and body temperature [1]. Although SLN possess several advantages, e.g., the use of physiological lipids, the avoidance of organic solvents in the preparation process, protection of sensitive molecules from the environment and controlled release characteristics, some disadvantages have been associated such as particle growth, unpredictable gelation tendency, polymorphic transitions and inherently low incorporation capacities due to the crystalline structure of the solid lipid [2]. The second generation of lipid nanoparticles, nanostructured lipid carriers (NLC) which are prepared by blending solid and liquid lipids leading to amorphous solids, arose to overcome limitations of SLN by introducing a less ordered inner structure [3].