A study in Consumer Reports found elevated levels of lead and arsenic in 3 out of 31 popular brands of grape and apple juice. High levels of these metals can increase the risk of heart disease, cancer, memory problems and other illnesses later in life. The source is probably pesticides. I would limit the consumption of these juices. We can test people of all ages to see if they have accumulated high levels of lead, mercury and arsenic.
See Consumer Reports in December of 2011 (click here) or go to healthcelebration.com to find out more about heavy metals.