Kim Jong Kook personally addressed the recent suspicions raised against him that he is abusing steroids.

On November 6 KST, Kim Jong Kook wrote on the community board of his YouTube channel 'GYM JONG KOOK', "In life, you run into all sorts of funny incidents... I was just going to lightly address the issue with a video and some comments, but it was even covered by the news. As a rookie YouTuber, I thought that it would make entertaining content so I couldn't just ignore this."

Kim Jong Kook then wrote, "If necessary, I will undergo every single test that exists in this world. For now, I completed one [test] today and if there is a very credible and recommended test, then please leave your suggestions in the comments below. I'm thinking about whether I should just register as an athlete to get tested at a professional doping agency. If any officials [from the agency] see this, dreaming of a bigger picture in promoting Korea's fitness development, I would be grateful if you gave me the opportunity to get one very detailed test. We have to show them that it might be impossible without drugs in that neighborhood, but a lot of people easily [build muscle] here in Korea~ ^^ (feat. Korea's spicy flavor). I don't need 1 million dollars...I think I would just be really embarrassed... I'm worried.."