Metal chelators are molecules that can bind to metal ions, forming a stable complex. They are important in various fields, including medicine, agriculture, and environmental science. By sequestering metal ions, chelators can help remove toxic metals from the body or soil, making them useful in treating heavy metal poisoning or improving soil quality. In medicine, metal chelators like EDTA are used to treat conditions such as lead poisoning. In agriculture, chelators can enhance the availability of essential nutrients like iron to plants, promoting healthier growth. Overall, metal chelators play a crucial role in managing metal ions in different environments.