Agar has demonstrated excellent performance as a nanocarrier in the field of drug delivery. Its natural polymer structure provides an ideal carrier for drugs and increases the solubility and stability of drugs by forming stable nanoparticles. Agar nanocarriers enable precise drug release in the body, delaying drug effects and reducing side effects. Its hydrophilicity and biocompatibility make this carrier easier to interact with biological fluids. By controlling the concentration and structure of agar, the size and shape of nanocarriers can be regulated, thereby achieving precise control of drug release. Therefore, agar nanocarriers exhibit potentially broad application prospects in drug delivery systems.