Actor Jo Yeo-jeong reveals secret to youthful looks: 'I just have to hold back'

Actor Jo Yeo-jeong has candidly shared the secret behind her youthful appearance, which she has maintained for 30 years. Her answer, in a word, was restraint.

JTBC released a preview clip Sunday for Please Take Care of My Refrigerator, titled "Unleashing the appetite she's been holding back (with Jo Yeo-jeong & Ha Seok-jin)."

Marking her 30th year since debut, Jo was asked by the cast about her secret to looking young. Without hesitation, she said it came down to "having no choice but to hold back my appetite."

She added that she eats jajangmyeon and ramyun only twice a year.

On Sunday, however, Jo was given a special cheat day. Having suppressed her appetite for so long, she said, "Even if it's a calorie bomb, I want to eat a ton before I leave."

The show's chefs cooked up calorie-laden dishes using ingredients from Jo's refrigerator. Chef Kim Pung drew gasps when he poured an enormous amount of oil into the pan.

As dish after dish appeared — foods Jo would never normally touch — her expression visibly changed.

Jo then let loose, unleashing the appetite she had long kept in check in a full-blown mukbang.

The episode of JTBC's Please Take Care of My Refrigerator featuring Jo Yeo-jeong and Ha Seok-jin airs Sunday at 8:50 p.m.