Editorial policy

Sources

Our nutrition guides draw on public-health and scientific sources such as the Dietary Guidelines for Americans, USDA FoodData Central, the NIH Office of Dietary Supplements, the World Health Organization and the National Academies. Each guide lists its sources at the end.

Plain language, no shaming

Every guide starts with a short answer. We write for people of every size and background, avoid moralizing about food, and point readers to a doctor or registered dietitian whenever a question depends on their own health.

App guides

Our three tracking-app guides compare apps on their published features, free plans and prices, with the date each price was recorded. No company pays to be included or ranked. Product names appear only in those guides.

Dates and updates

Each guide shows the date it was first posted and the date it was last updated. We review the library regularly and update a guide when guidance, prices or features change.

Corrections

If you spot a mistake, write to us through the contact page. We correct errors promptly and update the date on the guide.