Seven days was clearly enough for Lee Hyori, who took to her Twitter account today to announce is done with her lemon detox diet.
The singer, 33, started the gruelling detox around a week ago, telling fans how hungry she felt after just three days.
Today, she says: "The seventh day of my lemon detox diet. It's hard for me to keep up, so I'm going to stop.
"I had no idea the fight against hunger cravings would be so difficult."
However, although she didn't make the full 10 days, the week-long detox has done her good.
She adds: "I lost about 3kg [approx. 7 pounds] in seven days, but I heard the weight comes back quickly.
"Most importantly, my body feels cleansed, my eyes feel brighter. My shoulders used to always ache but don't anymore, and my nose is clear. But my face has gotten really old."
Having tried the tough diet for a week, she recommends a shorter period of time to anyone else wanting to give it a go.
"If it's too hard for the full length [of time], try doing it for one or two days over the weekend," she advises. "You'll realize how much you appreciate your food and how nice it is to have meals with the people around you. Maybe then you will naturally get interested in your eating habits and change them for the better."