Okay, yes, you can get DNA from hair. But—and this is a big but—it’s not automatic.
It all depends on how the hair was lost. Did it fall out naturally? Or was it yanked out with the root?
Think of a hair like a game of tug-of-war. If you just pluck a hair from your own head, you get the root—that little white bulb at the end. That bulb is packed with DNA.
The Root of the Matter (Literally)
The root is where the magic lives. It’s full of living cells and nuclear DNA, which is the gold standard for identifying someone.
But most hair we shed day-to-day? It’s dead by the time it hits your hairbrush. That strand is just keratin—a tough protein with no living cells.
So if you find a single hair on your pillow after a nap? Probably no nuclear DNA. Sorry, CSI.
