Chelates are chemical compounds that are heterocyclic in nature. They have one central metallic ion that is bonded to two or more nonmetallic ions featured in the same molecule. They are well known for having one or more hydrogen bonds in them. You may be surprised to learn that there are chelates in the blood, known as hemes, which is where hemoglobin got its name. Another biological substance that is considered to be a chelate is chlorophyll in plants. Chelates play an important role in biology and chemistry. For one, they are excellent with transporting oxygen, and it treats the blood by helping to rid it of toxins such as lead, mercury, and arsenic. It is used as an alternative treatment for autism, as well as many other amazing applications. EDTA is a common chelate that is used in root canals, and it also softens water in laundry detergents and soaps, among many other things.