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Simple answer is that it kills infections.

It is poisonous in large concentrations (as found in direct application) but is actually beneficial in low concentrations. (as would happen when it diffuses through the body). Iodine deficiency is the cause of several thyroid abnormalities such as goutier.

The main reason that iodine kills is that it sets up a concentration bias that will rupture bacterial cell-membranes.

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15y ago
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Q: Why is iodine used as an antiseptic?
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