Baby Teeth May Hold the Answer to Toxin Exposure

It is fascinating, the number of answers baby teeth seem to hold:

https://www.washingtonpost.com/national/health-science/what-toxins-have-you-been-exposed-to-your-baby-teeth-may-hold-the-answer/2016/07/11/9cf1d740-1d18-11e6-b6e0-c53b7ef63b45_story.html