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    EDTA is a molecule called a chelating agent. A chelating agent is a claw-like substance that can grab and stick to other molecules.

    Some types of EDTA stick to calcium. Other types stick to metals, such as lead.

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    Why do people take EDTA?

    EDTA is sometimes prescribed by doctors to clean toxic metals, such as lead, from the blood. Doctors have used the molecule for decades to treat heavy metal poisoning. In those cases it is given through an IV.

    EDTA is also an ingredient in some prescription cancer-fighting medicines.

    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.

    Some have also advertised that EDTA might help fight clogged arteries (arteriosclerosis) by removing cholesterol and plaque from the bloodstream. Again, there is no research to show this really works.

    Some people take EDTA to try to treat:

    However, evidence is lacking that EDTA works for those conditions. Recent studies say it is not helpful and may even be dangerous.

    Optimal doses of EDTA supplements have not been set. Supplement ingredients and quality may vary widely. This makes it hard to set a standard dose.

    Can you get EDTA naturally from foods?

    EDTA is a chemical that is added to certain foods and beverages to help them keep their color and flavor. For instance, it is sometimes added to:

    The FDA says EDTA is considered safe for use in foods in the U.S.

    What are the risks of taking EDTA?

    The most common side effect of EDTA is burning at the IV site.

    Chelating agents can also have serious, even life-threatening side effects. One of the most serious side effects of EDTA is kidney damage and kidney failure.

    Other side effects that have been reported in patients taking some forms of EDTA have included:

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