Colloidal silver has no known function in the human body, and there is no evidence of its efficacy in aiding immune system function or treating any disorder, according to Mayo Clinic. The promoters of colloidal silver, however, claim that it is effective for a wide range of ailments.
Colloidal silver supplements contain particles of silver that are suspended in a liquid. Although some manufacturers market colloidal silver as an essential mineral or state that it helps protect against bacteria and viruses, these claims are not substantiated by scientific research, says Mayo Clinic. There are also safety concerns surrounding colloidal silver supplements as the silver particles can accumulate in the organs and potentially damage them, says MedicineNet.