EDTA is a molecule called a chelating agent, which grab and stick to other molecules. Supplement makers claim that over-the-counter forms of EDTA can be taken by mouth to "detox" the body and make your gastrointestinal tract healthier. There is no scientific evidence to support this.
Preliminary studies show that intravenous EDTA therapy under physician supervision may help patients who have had a heart attack, particularly if they have diabetes. However, more study is needed to prove this.