Harnessing natural source lipids for advanced drug delivery systems offers significant advantages, including biocompatibility, biodegradability, and the ability to encapsulate both hydrophilic and hydrophobic drugs. Lipid-based systems such as liposomes, solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), and self-emulsifying drug delivery systems (SEDDS) improve drug solubility, provide controlled release, and can be designed for targeted delivery to specific tissues, like tumors or inflamed regions, enhancing therapeutic efficacy. Natural lipids derived from plant, animal, and marine sources are key components due to their natural compatibility with biological systems. These lipid-based carriers have broad applications in cancer therapy, vaccine delivery (e.g., mRNA vaccines), neurological treatments, and ophthalmic care. They also reduce systemic toxicity and enhance patient compliance by enabling sustained drug release. However, challenges include lipid oxidation, scalability in large-scale manufacturing, and regulatory approval for novel lipid excipients. Advances in formulation technologies, such as the use of antioxidants and improved stabilization techniques, are addressing these hurdles, while regulatory frameworks continue to evolve. Overall, lipid-based drug delivery systems (LBDDS) hold boundless potential for revolutionizing drug delivery and therapeutic outcomes across a varied variety of therapeutic fields. By exploring the inherent advantages of natural lipids, this chapter underscores the critical role they play in advancing the efficacy, safety, and adaptability of drug delivery platforms, leading for more efficient handling modalities in various clinical contexts.