While crime dramas often depict detectives tracking down criminals using hair DNA, that's not the only thing they can learn. What else can be revealed about you from a hair sample?
Amazing Facts About Redheads: http://dne.ws/1gj3PMM
Challenges in DNA Testing and Forensic Analysis of Hair Samples
"People often assume hair samples make ideal samples for DNA testing. This notion might perhaps be due to the way hair samples are so often seen collected in detective crime fiction series and how solving the crime invariably hinges on finding such a sample."
Hair Drug Testing: Facts & Myths
"So, your boss asked you to get a hair drug test. Or maybe your ex. Or your parent. Or your future employer. And you have heard all kinds of rumors about what this test can detect, and for how long."
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