Historically, silver was used as an all-purpose remedy for various infections and illnesses due to its antimicrobial properties. This means that they’re less than 100 nanometers in size and invisible to the naked eye ( 6). The size of the silver particles in colloidal silver varies, but some are so tiny that they’re referred to as nanoparticles. “Colloidal silver” is the term used to describe tiny particles of silver suspended in a liquid ( 1). What is colloidal silver, and why is it used? The FDA considers colloidal silver unsafe due to its many side effects if taken orally, but it’s approved for topical use.
Ultimately, any colloidal silver product intended for oral use isn’t safe or recommended. It also reduces the absorption and efficacy of certain drugs, such as antibiotics and the thyroid medication thyroxine ( 1, 4, 5). However, colloidal silver drugs that are marketed for oral intake are not legal for sale ( 1).Ĭonsumption of colloidal silver is associated with many serious health risks, such as argyria, neurological damage, and liver and kidney harm.
Silver blue skin#
Otherwise, the product is considered misbranded and is subject to regulatory action ( 3).Ĭolloidal silver is approved for topical application on skin infections, skin wounds, and in bandages and dressings for the treatment of burns. However, this product is still commonly sold as a dietary supplement ( 1, 2).Īny company that produces silver products that are labeled or promoted to prevent or cure disease must undergo FDA approval prior to marketing. Since then, the FDA has not approved any new colloidal silver drugs on the market. In fact, the FDA deemed that all over-the-counter products that contain colloidal silver ingredients or silver salts are not generally recognized as safe or effective ( 1, 2). However, colloidal silver has been declared unsafe by the Food and Drug Administration (FDA) since 1999. Colloidal silver is a popular remedy in alternative medicine.
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