It’s difficult today to find an adult who doesn’t have a silver filling in their mouth. After all, it’s believed that around 42 percent of children have had cavities in their teeth, and 91 percent of adults have had them. Millions of people have had these cavities filled with a “silver” substance, which contains around 50 percent mercury. The problem is that mercury is a neurotoxin, which is a substance that we know to be poisonous to nerve tissue. Millions of unsuspecting people today walk around with these silver fillings that may actually be damaging their health without them even realizing it.