But all these people in Turkey walking around with their brand new hair follicles, aren't those from other people? Or from the same person, just elsewhere?
They take your existing hair follicles from areas that aren't thinning and move them to the thinning or bald area.
The follicles come from the back of your head. Feel your head, there's an area where the skull and vertebrae meet. Place your hand over that area. That's the "donor" area. Follicles on the front of your scalp are sensitive to DHT (what your body metabolizes testosterone into) for many humans. This is where male pattern baldness happens.