It's made of protein and sugars. If other chemicals get in the blood, they can show up in your hair too. Nearly two hundred years ago, he was the emperor of France. Some people think he was murdered and that he died from an overdose of a poison called arsenic. Scientists from the University of Toronto studied Napoleon's hair and found that it did not contain much arsenic.
Babies grow hair before they are born.
At Sick Kids, scientists are interested in baby hair because it is a memory of what came through the baby's body before birth. If the mother takes drugs before the baby is born, scientists can find traces in the baby's hair. If the mother breathes in smoke from other people's cigarettes, the baby's hair will contain nicotine. This isn't too good for the baby. All rights reserved.