Oral EDTA can cause mineral deficiencies and is not a good idea. EDTA is not good for chelating heavy metals, as it is a strong chelator of necessary minerals as well as heavy metals. Oral EDTA is also only around 5% absorbed. IV EDTA might be useful for artery disease, but isn't efficient for heavy metal detoxification. Use the Cutler chelation protocol with DMSA +ALA.