evidence: Colloidal silver’s benefits may extend to minor infections, irritations, skin wounds, and burns and in bandages and dressings for the treatment of burns. However, colloidal silver drugs that are marketed for oral intake are not legal for sale. [...] The only effective but debatable use of colloidal silver in humans is the topical application to wounds and burns. [...] Although these claims are not backed by research, many companies market colloidal silver supplements as an immune system booster, which can ease chest congestion and treat or prevent viral infections, such as the common cold.