The invention relates to solid lipid nanoparticle for intracellular release of active substances, can be used in the pharmaceutical industry, in the medicine, cosmetics, as well as for food supplements. Solid lipid nanoparticle has spherical shape with a diameter of 15 - 100 nm, the lipid is a solid lipid selected from natural plant wax or its synthetic analogue, as the surface acting agent is used TMDSC. The particles of solid lipid nanoparticle is characterized with high melting point, high lipophilicity and low (or lack) of in-vitro dissolution profile. The system is lipase-resistant and is capable to freely penetrate through cell membranes into cells where to release the active substance(s) due to an intracellular digestion with controllable depo-effect. In a second aspect, the invention relates to a method of production of the solid lipid nanoparticle. The preferred technology for production of the compositions is a Phase Inversion Temperature method.