On October 19, 2026, the U.S. Food and Drug Administration (FDA) released results from a multi-year sampling assignment that tested domestic and imported lemon juice for economically motivated adulteration, the agency’s term for food fraud. Every violative sample came from an imported product. All related shipments were refused entry, and the firms behind them were either placed on an import alert that lets FDA detain future shipments without examining them or subjected to increased screening.
Lemon juice is a narrow product, but the takeaway is not. FDA routinely tests foods it considers high risk for fraud, and a failed authenticity test at the border can affect a supplier’s shipments long after the original entry is refused.
What FDA Tested
FDA collected 195 samples between October 19, 2022 and January 22, 2025. Of these, 157 were imported products sampled at ports of entry before release into U.S. commerce, and 38 were domestic products collected at retail or from manufacturers. The assignment covered both straight lemon juice and juice reconstituted from concentrate.
To be sold as lemon juice in the U.S., a product must meet FDA’s standard of identity at 21 CFR 146.114. Juice made from concentrate must contain at least 6% soluble solids by weight and titratable acidity of at least 4.5% by weight, calculated as anhydrous citric acid. FDA tested for signs of added sweeteners, added citric acid, excess water, and juice from fruits other than lemons.
The agency used three main approaches:
- Citric acid to isocitric acid ratio: authentic lemon juice has a fairly consistent ratio, so a skewed result suggests citric acid was added.
- Stable carbon isotope ratio analysis (SCIRA): identifies whether citric acid came from lemons or from an outside source, such as industrial fermentation of corn or sugar cane.
- Brix testing: measures soluble solids to detect juice diluted with water or reconstituted with too much water.
What FDA Found
Seven of the 157 imported samples were violative, a 4.5% violation rate for imports. None of the 38 domestic samples were violative. Across all samples, the violation rate was 3.6%.
| Country of Origin | Samples Tested | Violative |
| India | 3 | 3 |
| Taiwan | 13 | 2 |
| Turkey | 1 | 1 |
| Vietnam | 1 | 1 |
FDA cautions against drawing conclusions by country, since the assignment was not designed for that comparison.
FDA concluded that lemon juice remains vulnerable to fraud but that the practice is not widespread, and said it may consider more targeted sampling going forward.
What Happened to the Shipments
- Refused entry: every shipment tied to a violative sample was refused admission into the U.S.
- Import Alert 99-47: FDA increased screening and sampling or placed the firms and products on Import Alert 99-47, which covers human food that appears to be adulterated for economic gain. Products on the alert are subject to detention without physical examination (DWPE), meaning FDA can hold them at the port without first inspecting or sampling the shipment.
- Getting released: to have products admitted, the firm must overcome the appearance of a violation, for example with third-party laboratory results showing the juice contains no undeclared ingredients and meets the standard of identity.
- Labeling problems: one firm was also placed on Import Alert 99-39 for misbranding, because its label listed an incorrect serving size and did not use the common or usual name of an ingredient.
FDA also noted it may pursue criminal investigations when appropriate and works with international regulators to address fraud in imported foods.
Why This Matters Beyond Lemon Juice
FDA prioritizes fraud testing for foods it considers high risk, including juice, honey, spices, olive oil, and seafood. The lemon juice results follow an earlier FDA sampling assignment on imported honey, which found about 3% of samples adulterated.
Food fraud is also a compliance issue, not only a testing issue. Under the Food Safety Modernization Act (FSMA), companies must address food safety hazards that may be intentionally introduced for economic gain. For importers, that includes the hazard analysis required under the Foreign Supplier Verification Program (FSVP).
What Importers Should Do Now
- Compare supplier specifications against the applicable FDA standard of identity (for lemon juice, 21 CFR 146.114).
- Request certificates of analysis backed by authenticity testing from accredited third-party labs, particularly for juice, honey, spices, olive oil, and seafood.
- Check FDA’s import alert lists, including Import Alert 99-47, for your suppliers and products before booking shipments.
- Confirm your FSVP hazard analysis addresses economically motivated adulteration where it could create a food safety hazard.
- Review labels for correct serving sizes and the common or usual names of ingredients, since misbranding can lead to a separate import alert.
- If a shipment is detained, contact your customs broker right away; release under DWPE depends on the evidence you provide.
ASK Alba™ Have questions about FDA sampling, import alerts, or a detained food shipment? Our trade compliance team can help you review supplier documentation and respond to FDA. Contact us today.
References
- FDA Constituent Update: FDA Releases Sampling Results on Economically Motivated Adulteration in Lemon Juice (October 19, 2026)
- FDA: FY 2023 to FY 2025 Sample Collection and Analysis of Lemon Juice for Economically Motivated Adulteration
- FDA: Appendix, Table of Analytical Results (Lemon Juice Assignment)
- FDA Import Alert 99-47: Detention Without Physical Examination of Human Food Products That Appear to be Adulterated for Economic Gain
- FDA Import Alert 99-39: Detention Without Physical Examination of Imported Food Products That Appear to Be Misbranded
- 21 CFR 146.114: Lemon Juice Standard of Identity
- FDA: Economically Motivated Adulteration (Food Fraud)
- FDA: Import Alerts
