Jo Kwon, or Kkap-Kwon, is known to have more than enough energy to spare, but he revealed that he literally doesn't have enough blood.

On the latest episode of 'Quiz to Change the World' on March 28, Jo Kwon shared, "I recently got a blood transfusion. I didn't know this, but I've been lacking blood for the past 27 years. I got about 7-8 packs of blood transfused."

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He explained, "Men normally have about 15-16 units of blood, but I had 9. I fell down on 'Idol Athletics Championship', and it turned out it was because I was anemic. I was told that if I keep eating well, it will naturally get better."

Who would've known? Hopefully, Jo Kwon keeps himself healthy!