Recently, Song Joong Ki sat down for an interview with Netflix.
While going through a series of random questions, Song Joong Ki was asked what a secret to his smooth skin was.

He is in his mid-30s, but he is known for his youthful appearance; he does not look his age at all.
His answer to this particular question has always been one thing that everybody wanted to know from him.

The actor answered, "Well, it's all thanks to my make-up artist."
He continued, "Also, I eat an apple and blueberries in the morning. That probably helps too."
Lastly, he laughingly added, "And I would like to thank my mom and dad for it. I love you both."

(SBS Star)