Is colloidal silver safe?
The U.S. Food and Drug Administration (FDA) has warned that colloidal silver isn’t safe or effective for treating any disease or condition. Additionally, the FDA and the Federal Trade Commission have taken action against a number of companies for making misleading claims about colloidal silver products.
Colloidal silver can cause serious side effects. The most common is argyria, a build-up of silver in the body’s tissues causing a bluish-gray discoloration of the skin, which is usually permanent.
Colloidal silver can cause poor absorption of some drugs, such as certain antibiotics and thyroxine (used to treat thyroid deficiency). There is also some evidence that it can cause kidney, liver, or nervous system problems.