Nutrition.gov
"Nutrition.gov provides easy access to the best food and nutrition information from across the federal government. It serves as a gateway to reliable information on nutrition, healthy eating, physical activity, and food safety for consumers.

Providing science-based dietary guidance is critical to enhance the public's ability to make healthy choices in the effort to reduce obesity and other food related diseases. Since dietary needs change throughout the lifespan, specialized nutrition information is provided about infants, children, teens, adult women and men, and seniors..."