Scientists at the University of Pennsylvania have shown the potential for regenerating hair follicles. They’ve found a revolutionary way to convert adult cells into epithelial stem cells. The cells were inserted into mice and regenerated various types of human skin and hair follicles. Their new method of production resulted in 25% of the stem cells into epithelial stem cells within 18 days. However, the epithelial cells are just one component of the hair follicle. They now need to find a way to make new dermal papillae cells, which are the small extensions of the dermis in the epidermis, so they can move on to testing humans.