Ethylene Diamine Tetra-Acetic Acid. Heavy Metal Detoxification. Our bodies are continuously assaulted by toxic heavy metals such as lead and mercury found in our air food and water supply. Scientific studies show that EDTA an amino acid-like compound supports detoxification through excretion of heavy metals from the body. EDTA works by chelating (binding to and capturing) toxic heavy metals and minerals for removal through the lower GI tract or urine.