The German Federal Institute for Risk Assessment (BfR) advises against using nanoscale silver ions in consumer products: food, textiles or cosmetics. The BfR feels there is a need for research to elucidate the fundamental issues in conjunction with the use of nanoscale silver as an antimicrobial material. On what scale do consumers come into contact with nanoscale particles? How big is the danger of resistance development? BfR recommends refraining from using any nanoscale silver in consumer products until a definitive safety assessment becomes available.

Silver and silver compounds release silver ions that can inhibit the growth of germs. For that reason they are used for instance in cosmetics, textiles and household appliances. Furthermore, silver is approved as a colour additive for food (E174). For instance, the surfaces in fridges coated with nanosilver are intended to inhibit the growth of germs and nanosilver aims to prevent odour formation in sports socks.

According to the BfR, it is not possible at the present time to determine in a definitive manner whether nanosilver constitutes a health risk for consumers. “Until we are in a position to reliably rule out potential health risks, we recommend that manufacturers refrain from using nanosilver in consumer products”, says BfR President Professor Dr. Dr. Andreas Hensel.