PHM Biotic Silver Formula is neither better nor worse than any other colloidal silver product. Colloidal silver is not considered safe and no verifiable evidence exists that it provides any health benefits.
Colloidal silver products consist of microscopic silver particles suspended in a liquid. These products are marketed as oral dietary supplements. Manufacturers have claimed that they boost your immune system while preventing and/or curing ailments as diverse as cancer, AIDS, acne, warts, infectious diseases and enlarged prostates. However, not a single study that follows sound scientific principles has demonstrated that colloidal silver does any of these things. As a result, the U.S. Food and Drug Administration has taken actions against some of these manufacturers on multiple occasions for making unproven health claims.
While colloidal silver is not highly toxic, it does build up in human tissue and can have serious cosmetic side effects. The most common is argyria, a condition in which the skin, nails, eyes, and internal organs turn a shade of blue-gray. Argyria doesn't typically cause significant health issues, but neither does it go away even if you stop taking colloidal silver. For all of these reasons, no reputable health care professional or resource recommends the use of colloidal silver products, and they have not been listed in official drug guidebooks since 1975.