First off, you need to consult a doctor or dietitian to determine if your kid is indeed overweight or if he/she needs to loose weight fast. If a teen is really overweight, then moral and emotional support is one of the basic things needed to overcome their weight problems. Always remember that weight management is a long-term process and involves not just the person who will try to loose weight. It involves the people who prepare his/her food, among others. It has been found out that teens that have the support of their families show better results in weight reduction programs that those teens that go about the program on their own. When trying to loose weight, be sure that you do that in the safest way possible. Recent medical studies recommend losing not more than two pounds per week. Weight loss can be accomplished through a combination of programs which include exercise and decreased calorie intake. Make sure to get into a program that helps you loose weight the right way. The medical community warns of loosing more than 2% of one's body weight in a period of 24-48 hours. The results would be a decrease in aerobic performance and endurance. Meanwhile, losing more than 5% of one's body weight in three to four days will have detrimental results on one's power, muscle endurance and strength, aerobic performances and even mental concentration. With such extreme weight loss programs, the body looses the ability to cool itself which can cause more harm than good.Aside from the right exercise, you need to compliment this increased activity with the right diet. Avoid drinks that are high in calories like sodas, juices, and other drinks. If you cannot avoid sodas, switch to the diet or low calorie ones. Make sure that you drink lots of water or other sugar-free drinks. This will help you stay away from those sodas. Sometimes, it is best to take one step at time. More often than not, one tends to go back to their normal ways quickly if changes are introduced drastically. That's why it is better to move forward gradually rather than leaping two to three steps forward and finding yourself five steps back after a few weeks. One great tip in reducing your food intake is to stop eating when you're already full. Avoid eating when you're emotionally unstable. This happens a lot, especially in teens with constant body changes. When people eat because they are bored, lonely, or stressed, they tend to continue eating despite that fact that they are already full. Eat slowly since it will take about 20 minutes before your brain recognize the amount of food in your stomach. Be sure to eat lots of fruits and vegetables. As much as possible, replace your junk food intake with fruits or vegetables. Not only will you loose weight but it will keep your heart and body healthy. Also, don't replace food groups or avoid eating them in your attempt to loose weight. As a teenager, you should avoid such forms of diets since your body still needs the nutrients for growth and development. Diet pills are also a no-no. These pills can be very dangerous to one's health even if taken with a doctor's prescription. It is better to go about loosing weight the more natural way. It will create discipline and is more sustainable in the long run.