The invention relates to methods for treating hair graying. More specifically, the present invention discloses new methods for reducing, stopping and/or reversing of hair graying in mammals by stimulating stem cell migration to produce or stimulate melanocytes in hair follicles. The invention further teaches a stem cell mobilizing composition for treating graying hair in a subject, comprising blue-green algae, which stimulates stem cell mobilization and growth of melanocytes in hair follicles.
