It's sad that 1) she believes this and 2) some people actually do this, and think it's working in a heathy way.

You should have a talk with her about it. Save her the misery and starvation.

Teen fads about food are normal. But, I think you should keep on reminding her about healthy foods and not eating too much junk food. Thirteen year olds should still enjoy some sort if sports and should not even be thinking about weight loss diets.

Haha your name is perfect

This FML makes me sad. If she legitimately doesn't know that this diet won't sustain her it's not up to you to criticize her for it. You're her parent and teacher. I don't think I learned what a calorie was until I was that age.

The solution may be to just let her find out herself. Im not saying starve her, but im sure after a day of just colored water, she'll be back to normal.

Be a good parent and don't let your daughter go through with that diet... Definitely unhealthy...

This was stupid, yes, but you shouldn't be calling her an idiot. You're the one person who's always supposed to be on her side.

Education is key.

Someone needs a few "critical thinking" classes to learn to protect herself from stupid claims made by the ignorant and the malicious.