Chelation therapy is a medical treatment that involves using chelating agents—special chemicals that bind to heavy metals in the body—to remove them through urine. It is typically used to treat severe cases of heavy metal poisoning, such as lead poisoning in children or Wilson's disease, a rare genetic disorder that causes copper to accumulate in the body. While this therapy can be life-saving in these situations, its use for less severe cases or as a preventive measure is highly debated in the scientific community. Some groups, including certain holistic medicine practitioners and online communities, promote the idea that removing even small amounts of heavy metals from the blood could help with conditions like headaches, insomnia, or even prevent disorders such as autism spectrum disorder (ASD) or Alzheimer's disease. However, these claims are not supported by scientific research. Studies have shown mixed or disappointing results when chelation therapy is used for these purposes. In some cases, the treatment has even caused harm, such as when it was used in early-onset Alzheimer's disease, where it led to a faster decline in cognitive function despite reducing iron levels. Heavy metals like lead, cadmium, and mercury are known to be toxic at high concentrations, while others, such as iron and cobalt, are essential in small amounts but can be harmful when present in excess. Researchers have found links between high levels of these metals and various health issues, including heart disease, inflammation, high blood pressure, and certain cancers. Lead exposure is especially concerning for children, as it can lead to a significant drop in IQ worldwide. In the United States, blood levels of metals like lead and cadmium have declined over the past 25 years, but some communities, particularly in urban or minority areas, may still have higher exposure due to environmental factors. Chelation therapy is used very rarely, with only about 7 out of 100,000 children needing it due to high lead levels. Experts like Adam Blumenberg, a toxicologist at Columbia University, caution that it should only be used when there is a clear medical benefit, as it can remove essential metals like zinc along with harmful ones. Recent studies on chelation's effects on heart health have produced conflicting results. A 2024 study published in JAMA found that it did not reduce the risk of heart attacks in diabetic patients with a history of heart disease, even though blood lead levels dropped. This contrasts with a similar study from a decade earlier, which showed some cardiac benefits. Researchers suggest that lower lead levels in the newer study may have influenced the results. Natural substances like garlic and chlorella, a type of algae, are sometimes marketed as alternative chelating agents, but their effectiveness and safety are not proven. The U.S. Food and Drug Administration (FDA) has issued warnings about over-the-counter chelating products, urging consumers to seek professional medical advice. Experts recommend against using chelation therapy for unexplained symptoms or to prevent chronic diseases, as it can delay proper treatment. Instead, they suggest addressing the source of metal exposure when possible and consulting local poison control centers for guidance.