The Centers for Disease Control and Prevention (CDC) is an agency of the U.S. Department of Health and Human Services. The CDC works with state and local health officials and the public to achieve better health for all people. The CDC creates the expertise, information, and tools that people and communities need to protect their health—by promoting health, preventing disease, injury, and disability, and being prepared for new health threats.

The U.S. National Heart, Lung, and Blood Institute (NHLBI) information center offers information and publications about preventing and treating:

• Diseases affecting the heart and circulation, such as heart attacks, high cholesterol, high blood pressure, peripheral artery disease, and heart problems present at birth (congenital heart diseases).
• Diseases that affect the lungs, such as asthma, chronic obstructive pulmonary disease (COPD), emphysema, sleep apnea, and pneumonia.
• Diseases that affect the blood, such as anemia, hemochromatosis, hemophilia, thalassemia, and von Willebrand disease.

The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) provides information and conducts research on a wide variety of diseases as well as issues such as weight control and nutrition.

Overeaters Anonymous (OA) is a nonprofit international organization that sponsors a 12-step program to help people understand and overcome compulsive eating disorders. OA is not a weight-loss program and makes no claims for weight loss. The program focuses on the psychological and social aspects of overeating.

Shape Up America! is a national coalition of industry and medical experts in nutrition and fitness. Its goals are to make Americans more aware of the importance of maintaining a healthy weight and to provide information about how to lose weight and stay fit. The organization has published several booklets on weight loss and diet, which can be ordered from the Web site.

The Weight-control Information Network (WIN) is a service of the National Institute of Diabetes and Digestive and Kidney Diseases, part of the National Institutes of Health. WIN supplies information on weight control, obesity, and nutritional disorders for the public and for health professionals.