Nanocarriers are tiny delivery systems designed to transport drugs or other therapeutic agents directly to specific cells in the body. They are often made from materials like lipids or polymers and can be engineered to improve the effectiveness of treatments while minimizing side effects. By encapsulating drugs, nanocarriers can enhance their stability and control their release, making them valuable in fields like cancer therapy and gene delivery. These advanced systems can also be tailored to target particular tissues or cells, increasing the precision of treatment. Researchers are exploring various types of nanocarriers, including liposomes, nanospheres, and dendrimers, to optimize their performance in medical applications.