Changes
[[Image:Doubleaction2.jpg|thumb|center|700px|Double action]]
== Hair matrix cell activator ==
* Stem cells of the hair follicle are gathered in the basal layer of the outer root sheath bulge.
* It is from these cells that matrix cells are formed.
* Growth and differentiation of the matrix cells are under the influence of substances produced by cells of the dermal papilla.
[[Image:Hair matrix.jpg|thumb|center|700px|Hair matrix cell activator ]]
[[Image:Hair matrix1.jpg|thumb|center|700px|Hair matrix cell activator ]]
