Kim Tae Won revealed an unfortunate side effect of the lemon detox diet he tried out for a month.

On the January 31st broadcast of KBS' 'Happy Together', Kim Tae Won shared that he is a diet enthusiast as he is a rocker who wants to maintain his slim figure to pull off tight leather pants.

Comedian Kim Joon Ho, who guest stars on 'Qualifications of Men' with Kim Tae Won, shared, "He only eats grass for dinner." Kim Tae Won confirmed this by saying, "Sometimes, I only eat vegetables."

Kim Tae Won also shared his personal experience with the lemon detox diet, and revealed, "I lost a lot of weight in one month. But after the month, I started experiencing hair loss due to the diet."

The singer also revealed that he is much healthier now than he used to be back then, having put on more weight and being more active as he attends several schedules during the week.