To provide a hair-growing agent without using chemical components for evading harmful effects such as skin troubles as a component of the hair-growing agent, using conventionally reliable vegetable raw materials, penetrating the component of the vegetable raw materials well into the depth of radix pili, also reducing active oxygen in scalp surrounding the radix pili, obtaining the vegetable raw materials inexpensively and produced simply, and a method for producing the same.

This hair-growing agent is characterized by incorporating an extract of the pericarp of citruses in electrolytically reduced water having active hydrogen produced by electrolysis. The method for producing the same is characterized by putting the pericarp of the citruses into the electrolytically reduced water produced by the electrolysis and having active hydrogen, boiling down in a state of generating steam, cooling the obtained boiled down liquid and filtering, and adding further the electrolytically reduced water to the extract obtained by the filtration.