How does a 12 year old girl lose weight in 2 weeks?

A 12 year old girl should not attempt to lose weight without the supervision of a doctor or dietitian. Rapid weight loss can be dangerous for children and adolescents and can lead to a number of health problems. If you are concerned about your child's weight, talk to your doctor or a registered dietitian. They can help you develop a healthy eating plan and exercise routine that is right for your child.