Chinese scientists have developed an electric comb for hair restoration:.
"They called her Detangle - referring to the cartoon about Rapunzel. The teeth have built-in electrodes and cells for molecules that stimulate hair growth. Electrical impulses help move these molecules into the hair follicle cells.
Over the course of 28 days, the mice tested on the comb had almost full hair growth in the shaved areas. In the group that received minoxidil, he recovered by about 70%."