David S. Ludwig, MD, PhD, is an endocrinologist, researcher, and professor at Harvard Medical School and Harvard School of Public Health. Dr. Ludwig also co-directs the New Balance Foundation Obesity Prevention Center at Boston Children’s Hospital. His research focuses on how food affects hormones, metabolism, body weight, and well-being.

Described as an “obesity warrior” by Time magazine, Dr. Ludwig has fought for fundamental policy changes to restrict junk food advertising directed at young children, improve the quality of national nutrition programs, and increase insurance reimbursement for obesity prevention and treatment.

He has received numerous grants from the National Institutes of Health and published over 150 scientific articles and is a Contributing Writer for the medical journal JAMA.

Dr. Ludwig’s first book is titled Ending the Food Fight: Guide Your Child to a Healthy Weight in a Fast Food/Fake Food World. He appears frequently in national print and broadcast media.

Dr. Ludwig lives in Brookline, Massachusetts, with his wife, Dawn, and son Benji. He can be found most weekends with nice weather biking along the Charles River.