This is a review of the health checkup I received at Seoul Asan Internal Medicine Clinic in Daegu. I have a history of having polyps removed because they were always found during colonoscopies. That is why I schedule colonoscopies every two years. Since a new clinic offering checkups opened near my home, I decided to try Seoul Asan Internal Medicine Clinic, which has excellent facilities. What I liked most was that I only had to take the pre-colonoscopy medication in the morning. The medication is called OnePrep, and it was so convenient because I just had to mix the powder four hours before the test and take it twice. Before, it was a real ordeal to struggle with going to the bathroom starting at night, but since I only had to go in the morning, I was able to get enough sleep, which was great. The facilities were also state-of-the-art, which was a plus. With a professor with 15 years of experience in Gastroenterology at a university hospital, the explanations were detailed, giving me confidence in the clinic.