A resource created by the International Food Information Council, these resources come from a variety of expert organizations. Includes fact sheets and research articles on a variety of nutrition topics.
From the Harvard School of Public Health, this site offers information on nutrients, offers expert answers on nutrition questions, tips for a healthy lifestyle, and recipes
In addition to tracking your habits, you can search their food database to see if something is actually healthy. Useful if you have a hard time reading nutrition labels!