Kara's Hara and Han Seung Yeon were diagnosed with having hardened arteries.

On a recent episode of KBS2 "Vitamin," they had a special 500th episode titled "10 Year Younger! Tips to Live 10 Years Longer!" On the show, they examined urinary, cardiovascular, endocrine, dental, cancer, and bone health.

In this episode, the cast members as well as guests were measured for pulse speed, blood pressure, blood vessel "age," and had carotid ultrasounds.

In the midst of all this, Kara's Hara and Han Seung Yeon were found to have a shocking blood vessel age. To this Hara said, "Because I have such a busy schedule I don't have a lot of time, and so I don't usually get to eat every meal. I think that's the cause of my problem."

Seung Yeon said, "I knew that my irregular living habits would lead to a bad result. From now I'm going to change my eating habits and lifestyle to overcome this and become healthier."

Severance Hospital cardiology professor, who appeared on the show, said, "We wanted to determine the resilience of blood vessels in the arterial wave for Han Seung Yeon and Hara, and found that there is a slight hardening of the arteries. There is a good chance of improving their health by changing their lifestyles and focusing more on their health."