Lawsuits claim zinc in denture cream builds up in body causing health problems

A dozen claims are pending around the country, alleging that PoliGrip and Fixodent contain unsafe levels of zinc. The lawsuits allege that zinc competes with copper in the body to bind to certain receptors, and a build up over time negatively affects neurological function.  The manufacturers claim the amount of zinc ingested is safe and comparable to eating six ounces of beef.