Answer: Colloidal silver (a solution with silver particles) has antiseptic activity, and for this reason, has been promoted for a wide number of uses, from treating sinus infections and ear infections to boosting the immune system. It has also been promoted to help treat diabetes, arthritis, thyroid conditions, and even cancer.
However, there is no clinically-proven benefit from ingesting colloidal silver, and there are potential risks. The FDA banned the use of colloidal silver in over-the-counter products in 1999, although it is still legally sold as a dietary supplement. An analysis of colloidal silver products sold online found that few contained the concentration of silver claimed on the label.
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