Welcome to The Nutrition Source, a Web site maintained by the Department of Nutrition at the Harvard School of Public Health.

Aside from not smoking, the most important determinants of good health are what we eat and how active we are. The Nutrition Source is designed to get you started down the path toward the healthiest diet possible.

A lot of confusing information about nutrition gets batted about in the media and on the Web. The Nutrition Source will cut through all that confusion, providing clear tips for healthy eating and dispelling a few nutrition myths along the way.

Read more about healthy eating:

Use a food pyramid that's actually based on the latest and best science.

Coffee Drinkers Can Rest Easy

New research suggests that drinking up to six cups of a coffee a day does not increase the risk of death from heart disease or cancer. Read our interview about coffee and health with Dr. Rob Van Dam, one of the study's coauthors.

Food Safety Concerns

Even before the tomato warning, a substantial proportion of Americans lacked confidence in the system for protecting food safety, according to a survey conducted by the Harvard School of Public Health. Read more.

Vitamin D for a Healthy Heart

New research suggests vitamin D deficiency may increase the risk of heart disease. Read our interview with the study's lead author, Dr. Edward Giovannucci, about vitamin D's role in prevention of heart disease, cancer, and other chronic diseases.

New Obesity Book Provides Research Roadmap

A new book by Dr. Frank Hu explores obesity's causes and consequences—and explains the research methods that epidemiologists use to advance knowledge in this field.