Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 건강 나빠진 이유가 햇빛 안 봤기 때문? 불면증 만성염증 암세포 로부터 내몸을 지키는 일광욕의 효과 멜라닌과 멜라토닌 효과의 차이점[돈건통] -Dr. Peter Kim 김찬우-. That video is uploaded by 통찰의학 돈건통 at 2020-02-07T03:00:09-08:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [BTzPmt04MfU]