Taking a Deep Dive into FoodData Central

America has the most abundant food supply in the world, and the choices available to American consumers are increasing every day. As scientific understanding of the relationships between diet and health has accelerated, and so has the public’s interest in how the food we eat affects our overall health and wellbeing. The need for transparent and accessible food composition information has never been greater. USDA’s FoodData Central website is the national public resource for trusted food composition information. Dr. Janice Rueda is the Research Leader of the Food for Health of People and the Environment Laboratory at the USDA ARS Human Nutrition Research Center. This Center manages FoodData Central.

Welcome Dr. Rueda to Under the Microscope:

UM: What is the purpose of FoodData Central (FDC)?

JR: FDC is America’s public resource for trusted food composition information. FDC connects agriculture to food and health, and the validated, reference-grade data made available here underpin critical functions across the entire agriculture-food value chain.

UM: Who is it built for? Who uses this site most often?

JR: FDC is one of the most accessed websites of the federal government, and its users represent every facet of the agri-food economy. It is used by food producers, food companies, and other professionals in the ag industry. It is also used by everyday Americans to help make informed dietary decisions, and health professionals & dietitians to develop diets and educational materials for patients/clients. And nutrition/diet tracking app companies rely on FDC data and its Application Programming Interface (API) to enable features like personalized meal plans, nutrition education and in-app coaching.

UM: Why is it important to know and understand the nutrient information of America’s food supply?

JR: In addition to supporting public health initiatives, FDC’s comprehensive, rigorous food composition information supports market development, enables innovation, and is key to unlocking the future of nutrition science, including precision nutrition and health. USDA’s food composition data connects research to real life. It gives non-technical users access to the same reference-grade data that is used by researchers to understand how diet affects health and by food makers to create products that provide these benefits.

UM: What is the best way for a first-time consumer to get started with FDC?

JR: FDC has several resources to help first-time, non-technical users navigate the site and find the information they need. FDC features a series of quick start videos that demonstrate how to search for foods and explain different data types available. There is also an “About Us” page with how-to information in written form.

The simplest way for a first‑time user to get started is to use the main search bar on the homepage. Typing in any food like “banana” returns results across all FDC data types. From there, they can open the food item, view nutrient values and other details, and explore related items. Users can also start by searching for a nutrient or food component (for example, “protein” or “water”), which shows how that component appears across different types of foods. The search bar is the easiest entry point for exploring the system.

UM: How much nutrient information can a user collect from the site?

JR: A user can access a very large amount of nutrient information. Across all data types, FoodData Central contains hundreds of thousands of foods and tens of millions of nutrient and food‑component values.

The nutrient data come from five datasets:

• Foundation Foods – Detailed analytical values and extensive metadata on minimally processed foods.
• Standard Reference (SR) Legacy – Historic analytical and calculated nutrient data.
• Experimental Foods – Data from peer‑reviewed research supported or conducted with USDA.
• Branded Foods – Label‑based data from national and international brands.
• Survey Foods (FNDDS) – Nutrient values and portion weights for foods reported in national dietary surveys.

Together, these allow users to look up nutrients in analytical datasets, branded foods, survey foods, and research foods, depending on what they need. Users can request an API key to access data on-demand. Alternatively, downloads of the data are available for all releases in both JSON and CSV formats.

UM: What if I cannot find a particular food item?

JR: We welcome feedback from users, and there is a “Contact FoodData Central” link at the top right corner of the landing page. Our team can check whether the food exists under another name, whether it is archived, or whether it should be considered for a future update.

UM: Is FDC being used by private companies to build Apps so consumers can track daily their nutritional intake?

JR: Yes! Private companies use FDC to build apps and tools that help consumers track their daily food and nutrient intake. FDC provides a public API, and all data are freely available, which allows developers, as well as researchers and consumers, to build application products without special permissions.

UM: For the next iteration of the FDC site, how are you making it even easier or more effective for users?

JR: The next version of FDC will feature enhancements like improved search functionality, user-defined downloads, and overall site usability:

• Search improvements – better filters, stacking data types, and more intuitive component searching.
• Download improvements – clearer options and faster access to the datasets.
• Feature improvements – a more consistent interface, better navigation, and a more efficient backend to support future tools.

These updates are shaped by user feedback and FDC’s modernization strategy. We’re really excited about what’s next for nutrition and FDC, and we look forward to sharing future enhancements!