Poorly produced moonshine can be contaminated, mainly from materials used in the construction of the still. Stills employing automotive radiators as condensers are particularly dangerous; in some cases, glycol produced from antifreeze can be a problem. Radiators used as condensers could also contain lead at the connections to the plumbing. Using these methods often resulted in blindness or lead poisoning in those who consumed tainted liquor. This was an issue during Prohibition when many died from ingesting unhealthy substances. Consumption of lead-tainted moonshine is a serious risk factor for saturnine gout, a very painful but treatable medical condition that damages the kidneys and joints.