Teens' Page

If you are a teenager, this page is for you!

It includes materials specifically for you - not for your parents - about health and safety for teens. There are quizzes, games and lots of cool web sites for you to explore. Have fun!

Obesity in Children

Obesity means having too much body fat. It is different from being overweight, which means weighing too much. Both terms mean that a person's weight is greater than what's considered healthy for his or her height. Children grow at different rates, so it isn't always easy to know when a child is obese or overweight. Ask your health care provider to check whether your child's weight and height are in a healthy range.

If a weight-loss program is necessary, involve the whole family in healthy habits so your child doesn't feel singled out. Encourage healthy eating by

• Serving more fruits and vegetables
• Buying fewer soft drinks and high-fat, high-calorie snack foods
• Making sure your child eats breakfast every day
• Eating fast food less often
• Not using food as a reward

Physical activity is also very important. Kids need about 60 minutes each day. It does not have to happen all at once. Several short periods of activity during the day are just as good.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Clinical Trials

Clinical trials are research studies that test how well new medical approaches work in people. Each study answers scientific questions and tries to find better ways to prevent, screen for, diagnose, or treat a disease. Clinical trials may also compare a new treatment to a treatment that is already available.

Every clinical trial has a protocol, or action plan, for conducting the trial. The plan describes what will be done in the study, how it will be conducted, and why each part of the study is necessary. Each study has its own rules about who can take part. Some studies need volunteers with a certain disease. Some need healthy people. Others want just men or just women.

An Institutional Review Board (IRB) reviews, monitors, and approves many clinical trials. It is an independent committee of physicians, statisticians, and members of the community. Its role is to

• Make sure that the study is ethical
• Protect the rights and welfare of the participants
• Make sure that the risks are reasonable when compared to the potential benefits

In the United States, a clinical trial must have an IRB if it is studying a drug, biological product, or medical device that the Food and Drug Administration (FDA) regulates, or it is funded or carried out by the federal government.

NIH: National Institutes of Health

Hepatitis

Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. Hepatitis is an inflammation of the liver.

Viruses cause most cases of hepatitis. The type of hepatitis is named for the virus that causes it; for example, hepatitis A, hepatitis B or hepatitis C. Drug or alcohol use can also cause hepatitis. In other cases, your body mistakenly attacks healthy cells in the liver.

Some people who have hepatitis have no symptoms. Others may have

• Loss of appetite
• Nausea and vomiting
• Diarrhea
• Dark-colored urine and pale bowel movements
• Stomach pain
• Jaundice, yellowing of skin and eyes

Some forms of hepatitis are mild, and others can be serious. Some can lead to scarring, called cirrhosis, or to liver cancer.

Sometimes hepatitis goes away by itself. If it does not, it can be treated with drugs. Sometimes hepatitis lasts a lifetime. Vaccines can help prevent some viral forms.

Calcium

You have more calcium in your body than any other mineral. Calcium has many important jobs. The body stores more than 99 percent of its calcium in the bones and teeth to help make and keep them strong. The rest is throughout the body in blood, muscle and the fluid between cells. Your body needs calcium to help muscles and blood vessels contract and expand, to secrete hormones and enzymes and to send messages through the nervous system.

It is important to get plenty of calcium in the foods you eat. Foods rich in calcium include

• Dairy products such as milk, cheese, and yogurt
• Leafy, green vegetables
• Fish with soft bones that you eat, such as canned sardines and salmon
• Calcium-enriched foods such as breakfast cereals, fruit juices, soy and rice drinks, and tofu. Check the product labels.

The exact amount of calcium you need depends on your age and other factors. Growing children and teenagers need more calcium than young adults. Older women need plenty of calcium to prevent osteoporosis. People who do not eat enough high-calcium foods should take a calcium supplement.

NIH: National Institutes of Health Office of Dietary Supplements