Silver's allergenic potential is extremely low. There exist only a few recorded cases of allergy in people who have been in constant contact with high concentrations of silver – for example silversmiths or silver miners. Most people who believe they have a silver allergy actually have an allergic reaction to nickel, because silver used for jewellery often contains nickel. Standardized testing confirmed that the Hansaplast MED with Silver Technology line with silver technology is skin-friendly.