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EDTA is universally used as a food preservative(therefore, itâs generally recognized as safe) and weâre exposed to arather large amount (15-50 mg) every day. EDTA, by binding andneutralizing the action of iron and heavy metals, prevents oxida-tion and rancidity in prepared and processed foods and oils.
EDTA helps to stop DNases from acting on the exposed DNA, which is obviously important if youâre trying to get the DNA for a specific purpose, like sequencing. DNases are enzymes that âchew upâ DNA, so itâs important to keep them from acting on your DNA of interest.