 Lipid nanoparticles, LNPs, specifically solid lipid nanoparticles, SLNs, and nanostructured lipid carriers, NLCs, have garnered significant attention due to their advantages such as good release profile, targeted drug delivery, and excellent physical stability. NLCs are modified SLNs that enhance stability and capacity loading with three proposed structural models. LNPs have potential applications in various fields including drug delivery, research, cosmetics, and clinical medicine. This article discusses the features, structure, innovation, preparation methods, advantages, disadvantages, and applications of LNPs focusing on SLNs and NLCs. This article was authored by Nata Naziri, Hadi Valizata, and Parvind Zakiri Malani.