Data & study documents
Explore public dietary data—and its limits
NHANES August 2021–August 2023 Dietary Interview Data, Documentation, and Codebooks
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Fasting Free source summary: https://fastingfree.com/education/nhanes-dietary-data/
PLAIN-LANGUAGE SUMMARY
What this source adds
Provides food, nutrient, and eating-occasion information for population research. Documentation explains survey weights, recall methods, and changes in interview mode.
Keep these limits in view
Observed eating times are not randomized. Associations can reflect health, work, or other differences; recall error and survey design must be considered. These data alone cannot prove fasting causes an outcome.
Understand the context
- Evidence type
- Observational survey data; no assigned intervention
- Population or scope
- Eligible participants in the U.S. NHANES survey
- Sample or coverage
- Depends on the selected files, valid recalls, and analysis exclusions
- Study duration or data period
- August 2021–August 2023 collection; 24-hour dietary recalls
Research terms in this source
Open a definition for help reading the study.