Cationic liposomes are lipid-based carriers widely used for gene and drug delivery due to their high biocompatibility and ease of modification. Their positively charged headgroups enable strong electrostatic interactions with nucleic acids, facilitating cellular uptake and transfection. Common components include quaternary ammonium lipids, cholesterol, and phosphatidylethanolamine, which enhance stability and membrane fusion. These liposomes are valuable in therapeutic applications, including CRISPR/Cas9 delivery, RNA-based treatments, and targeted drug formulations.