Automated Self-Administered 24-Hour (ASA24®) Dietary Assessment Tool

Extensive evidence has demonstrated that 24-hour dietary recalls provide the highest quality, least biased dietary data. Traditional 24-hour recalls, however, are expensive and impractical for large-scale research because they rely on trained interviewers and necessitate an extensive post-interview coding effort. These challenges are compounded by recommendations to collect multiple 24-hour dietary recalls for many research purposes. As a result, Researchers often make use of food frequency questionnaires, which are less expensive but contain substantial error.

To allow the use of 24-hour recalls in a wider range of research, investigators at the National Cancer Institute (NCI) created the Automated Self-Administered 24-hour (ASA24®) dietary recall system, a web-based tool that enables multiple, automatically coded, self-administered 24-hour recalls. The latest release, ASA24-2016, also permits researchers to collect data using single or multi-day food records, also known as food diaries. To learn more about 24-hour recalls and food records, visit the Dietary Assessment PrimerExternal Web Site Policy.

The ASA24 system was developed under contract with Westat, a social science research firm, and originally based on an automated self-administered recall developed by Dr. Tom Baranowski of the Baylor College of Medicine.

The ASA24 system is freely available for use by researchers, clinicians, and teachers. The ASA24 system consists of a Respondent Website used to collect dietary intake data and a Researcher Website used to manage study logistics and obtain nutrient and food group data files. Learn more about the:

ASA24-2016 is the only version accessible from both desktop/laptop computers and mobile devices (e.g. tablets, smartphones). Adaptations of the ASA24 system have been developed for children and international versions are also available/under development. This website provides details on the ASA24 system and how to access and use it in your research.

ASA24 Webinar

Learn more about the background of the ASA24 system, registering to use ASA24, the database and data files, and data cleaning.

View the July 2016 Webinar

ASA24 Listserv

A discussion forum for asking other researchers questions about how they are using ASA24.

Join the ASA24 ListservExternal Web Site Policy

Respondent Website

Researcher Website

Register to Use ASA24



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ASA24 is a registered trademark of HHS.