Losing weight

My daughter has a girlfriend who is losing weight. This is a great thing to be able to have enough control to lose 12 lbs. However, I know in my right mind that a 13 year old girl cannot lose 12 lbs in a month with healthy habits. Something is wrong here. I have watched this girl dwindle to a smaller frame before my very eyes. I have questioned my daughter about lunch and her habits. I can see the hollow rings forming around her face as vitamins and nutrition are leaving her body. She eats not one thing for lunch. If she brings her lunch she gives it away. But, she will eat candy, cookies, bread, junk and still lose weight. My daughter and her friends have noticed she likes to go the bathroom by herself. Always after she eats. She becomes angry if one of them wants to go with her, she will just say, "forget it, I will go later." I am worried. I express my concern to her parents, out of love and nursing instinct, they respond with her being just fine. Their daughter is just very disciplined, she will only eat good stuff. Funny that is not what her friends are saying, but I know I cannot force the issue. I have expressed my worry. There is nothing more I can do than wait. Girls and their weight. Our society makes it so difficult to raise healthy girls with normal muscle and bone structure. The magazines have girls who are twigs, starving limbs sticking out across the pages and causing our girls to wonder how to be just like them. I took my daughter for her check-up and I had her talk to the doctor about her ideal weight. The doctor explained to her the most weight she should ever lose is 5 lbs. Then she explained the healthy way to do this. We moms need to empower our girls. Give them the tools to conquer obstacles in ways that will better them and not set them up for failure. Encourage healthy eating habits. Fruits, vegetables, lower sugar intake, water, fewer fast-food items. What about exercise? We are raising children who want instant results, for instant gratification. This is a crippling habit that will cause failure in life. We need to teach patience, long term results, cause and effect, and to show them that life is about more than just today. What am I giving my daughter that will equip her to deal with problems, solutions, resolutions and accepting herself for who she is. Losing a few pounds isn't always a big deal, losing one's prespective because of trying to acheive perfection is.