She was only 18 at the time.
Koreaboo
1 hour ago
K-Pop idols are often forced to try to fit beauty standards in all aspects of their appearances. One of the most discussed issues is weight, with idols often resorting to extreme methods to be a certain size.
5 K-Pop Idols And Their Extremely Unhealthy, Borderline Dangerous Diets
Recently, a former idol trainee shared her own story of extreme dieting.
On February 28, KISS OF LIFE‘s Natty hosted Single’s Inferno star Lee Sian on her YouTube program, Natty’s House.

Before her appearance on the dating show, Lee Sian worked as a model and spent time as an idol trainee, appearing on Idol School and Produce 48. Ultimately, she did not make the final groups of either show but continued training under companies for a period.

Sian and Natty were trainees at the same period, which they discussed during this episode. The two both appeared on Idol School and were roommates.
When asked about the hardest part of the trainee experience, Sian stated that it was dieting. Natty affirms this saying that Sian lost a lot of weight at one point.
Sian then reveals that for the 2017 MAMA Awards, she was given the chance to attend alongside Fromis_9, who were performing. However, the CEO of her company at the time told her to attend; she needed to weigh less than 60kg (around 132 lbs), and she previously shared she was about 63 kg (around 139 lbs).
In order to try to meet this goal, Lee Sian says that she fasted for a week and experienced extreme dizziness and body weakness. The two recollect that she was so weak Natty had to put her pants on for her, and basically push her up the hill to their company.
You can check out the full episode below.