Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 뇌 활력도 테스트, 당신의 뇌는 얼마나 건강할까요? 치매 예방 테스트. That video is uploaded by 퀴즈코리아 at 2021-04-12T03:00:11-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [MbybvHSATNI]