The key issue and debate surrounding hair testing and whether it's accurate really is simply about whether the hair is washed or not. (myersdetox.com)
Treatment generally consists of clipping the area of surrounding hairs, washing your pet with a gentle cleanser, then applying a topical cream or powder as prescribed by your veterinarian. (petcarerx.com)
In mice, researchers have shown that if they isolate dermal papilla cells, which surround hair follicles in the skin, grow them in petri dishes to produce new cells, and then put the cells back in the mouse, new hair follicles will develop. (sciencemag.org)