The National Cancer Institute (NCI) created the Automated Self-Administered 24-hour (ASA24®) dietary assessment tool, a web-based tool that enables multiple, automatically coded, self-administered 24-hour recalls. The latest releases, ASA24-2016, ASA24-Canada-2016, and ASA24-Australia-2016, also permit data collection using single or multi-day food records, also known as food diaries. 

The ASA24 system is freely available for use by researchers, clinicians, and teachers. This website provides details on the ASA24 system and how to access and use it. The ASA24 system can be used by researchers for epidemiologic, interventional, behavioral, or clinical research. Clinicians can utilize this system to collect 24-hour recalls or food records from patients and receive complete nutrient analysis of the foods and beverages consumed during the collection timeframe. Educators may find it useful to have nutrition students analyze nutrient intake or compare diet assessment methods using ASA24.

Since ASA24 was released in 2009, 2,864 studies have registered to use ASA24 and 271,668 recalls or records were collected, as of December 2016. On average, 42 new studies register to use ASA24 every month and more than 3,500 recalls and records are collected.

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. More information related to the methodology, evaluation, and validation of this tool is available.

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.