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Source hierarchy
For A1C definitions and limitations, editors prefer the National Institute of Diabetes and Digestive and Kidney Diseases. Method standardization and interference questions are checked against NGSP materials. Intended-use claims for a device or home test are checked against current U.S. Food and Drug Administration information and, where needed, the exact product labeling. Privacy materials use current federal guidance from the U.S. Department of Health and Human Services, the Federal Trade Commission, and health information technology authorities.
For a research claim, editors seek the primary paper and read the methods, participants, outcomes, comparisons, uncertainty, and limitations. A press release or news story can show how a claim traveled, but it does not replace the study.
Fact-check sequence
Our fact-checking standard is to compare each factual claim with the supporting source, including names, dates, units, definitions, denominators, and whether a measure is absolute or relative. The review should ask whether the sentence implies causation from association, extends a result to an unstudied population, or omits an important limitation. This policy is not a certification that a clinician has reviewed the site.
When official sources disagree or address different questions, the article describes the distinction instead of choosing the most dramatic wording. Product-specific information is dated and attributed because labels and authorizations can change.
What a citation does not mean
A source link does not mean that its author endorses A1C Avenue. Inclusion of a study does not certify that every conclusion is settled. A citation also does not turn an illustrative dataset into medical evidence. Readers should follow the source and examine its date, audience, and limitations.
Core reference shelf
- The A1C Test & DiabetesNational Institute of Diabetes and Digestive and Kidney Diseases
- Diabetes Tests & DiagnosisNational Institute of Diabetes and Digestive and Kidney Diseases
- How to Understand Your Lab ResultsMedlinePlus
- Factors that Interfere with HbA1c Test ResultsNGSP
- HbA1c Assay InterferencesNGSP
- List of NGSP Certified MethodsNGSP
- Home Use TestsU.S. Food and Drug Administration
- Continuous Glucose MonitoringNational Institute of Diabetes and Digestive and Kidney Diseases
- Health Products Compliance GuidanceFederal Trade Commission
- The Access Right, Health Apps, and APIsU.S. Department of Health and Human Services
- Blue ButtonAssistant Secretary for Technology Policy
- WCAG 2.2World Wide Web Consortium