Copper pipes could cause people over 50 to contract Alzheimer's and heart disease, a study has warned. Scientists have warned that tiny traces of copper from pipes contribute to a build-up of copper in the body, which can lead to Alzheimer's, heart disease and diabetes because the body cannot process the metal. A study published in Toxicology concluded that people over 50 should also avoid vitamin and mineral pills that contain copper and iron. Daily Telegraph, January 22, 2010