Copper Levels News Today

>> reporter: for the last ten years, 41-year-old construction worker mark jakoby had no idea why his body was failing. when you started to have symptoms and lose different types of muscle control, you kept using fixodent? >> yes. because i had no clue. >> reporter: doctors eventually tied his disorder to high levels of the mineral zinc. high zinc intake can lead to the depletion of copper levels in the body which can cause nerve damage. so, where did he get all the zinc? jakoby says it was his d...

>> reporter: for the last ten years, 41-year-old construction worker mark jakoby had no idea why his body was failing. when you started to have symptoms and lose different types of muscle control, you kept using fixodent? >> yes. because i had no clue. >> reporter: doctors eventually tied his disorder to high levels of the mineral zinc. high zinc intake can lead to the depletion of copper levels in the body which can cause nerve damage. so, where did he get all the zinc? jakoby says it was his d...

Pause the next time theyre in the meat aisle. for some chemical residues, the usda hasnt even set standards on possible levels of contamination in beef. >> reporter: traces of pesticides, heavy metals, antibiotics, could they be in the meat were buying? a report by the usdas inspector general said standards are too lax, or in some cases, nonexi nonexiste nonexistent. for example, it says in 2008, a shipment of american beef was turned away by mexico because it contained too much copper. but that...