Any drug that has been in your blood stream gets absorbed by the hair follicles in your scalp. As your hair grows out of these follicles, the hair strands also pick up traces of these drugs. The lab analyzes the shaft of the strand of hair for any drug metabolites present.
Bay Area airports prep for private jets in for Super Bowl 50 at Levi's Stadium. The Bay Area's airports are preparing for an influx of private jets for Super Bowl 50.
The Super Bowl this season will go back indoors at Houston's NRG Stadium, as the Super Bowl in 2016 took place in the elements of Northern California and Santa Clara's Levi's Stadium. Here's all you need to know about the Super Bowl in 2017. MORE SUPER BOWL: Ranking all 50 Super Bowls.