The present invention relates to a composition, which prevents depilation, improves hair growth or has sexual function-improving ability, and to a composition comprising the same. One embodiment of the present invention provides a novel strain of Brevibacillus reuszeri having the accession number of KCCM11911P.COPYRIGHT KIPO 2018본 발명은 탈모 예방, 발모 촉진 또는 성기능 개선능이 있는 신규한 균주 및 이를 포함하는 조성물에 관한 것이다.