Palmer v. Coca-Cola: Sprite, Citric Acid, and “Natural Flavors

The Palmer v. Coca-Cola Sprite lawsuit is a proposed class action filed in May 2025 in the Central District of California, alleging that Coca-Cola’s “100% Natural Flavors” claim on Sprite and Fanta is false because the drinks contain industrially manufactured citric acid, sodium citrate, potassium citrate, and artificial sweeteners including aspartame and acesulfame potassium.¹ Coca-Cola has moved to dismiss and to transfer the case, and as of mid-2026 both motions remain under submission.²

What the Complaint Alleges

Victoria Palmer filed the complaint on May 27, 2025, Case No. 2:25-cv-04777, assigned to Judge George H. Wu.³ She is represented by the Kazerouni Law Group.¹

The complaint covers several Sprite and Fanta products, including Zero Sugar versions. Its central factual claim is that the citric acid in these drinks is produced through an industrial fermentation process using the fungus Aspergillus niger, which Palmer argues makes it a synthetic compound rather than a natural flavoring.⁴ Palmer also points to the presence of sodium citrate, potassium citrate, aspartame, and acesulfame potassium as inconsistent with the “100% Natural Flavors” claim.¹

The lawsuit brings claims under California’s Consumer Legal Remedies Act, Unfair Competition Law, and False Advertising Law, along with breach of express warranty, unjust enrichment, negligent misrepresentation, and intentional misrepresentation.¹ Palmer alleges that consumers paid a price premium for the products because they relied on the natural-flavors label, and that health-conscious shoppers who seek out natural or organic products were particularly misled.⁴

Where the Case Stands

In July 2025, Coca-Cola filed a motion to dismiss, arguing that Palmer failed to plausibly allege the citric acid used in its products is artificial and that the state-law claims are preempted by federal law.⁵ The company also filed a motion to transfer venue. Both motions were argued on October 9, 2025, before Magistrate Judge Alicia G. Rosenberg and taken under submission. The parties later filed supplemental memoranda on the transfer motion.³

As of June 2026, Judge Wu denied a joint request to extend the briefing schedule, and the case was reassigned to Magistrate Judge Christina T. Shay for discovery matters. No ruling on the motions has issued.²

Why Citric Acid Is the Core Dispute

Citric acid occurs naturally in citrus and other plants, and the FDA lists it as “Generally Recognized as Safe” under 21 CFR 184.1033. The same regulation permits citric acid to be “recovered from sources like lemon or pineapple juice, or produced via mycological fermentation.”⁶ The FDA also identifies citric acid as having antimicrobial and antioxidant technical effects, both preservative functions.⁷

Plaintiffs in this line of cases argue that nearly all commercially used citric acid is manufactured through industrial fermentation with Aspergillus niger, a mold, and that the resulting compound is chemically distinct from citric acid squeezed from fruit. On that view, any “natural” or “no preservatives” label on a product containing it is misleading. Food companies counter that fermented citric acid is chemically identical to the naturally occurring version and is used as a flavoring, not a preservative. Some courts have accepted that response; others have called it a factual question requiring discovery.

How Similar Citric Acid Cases Have Gone

Federal courts have split on when a citric acid labeling case can survive a motion to dismiss, and that split is the backdrop for Palmer.

Cases Allowed to Proceed

In Delvalle v. Coca-Cola Co. (S.D.N.Y. 2025), a judge denied Coca-Cola’s motion to dismiss claims that “No Preservatives Added” on Minute Maid Fruit Punch was false because of citric acid, holding that whether citric acid acts as a preservative, whether it was intended to, and whether it is “chemically processed” were factual disputes for discovery.⁴

In Hayes v. Kraft Heinz Co. (N.D. Ill. 2024), the court denied dismissal of a claim that “No Artificial Flavors, Preservatives, or Dyes” was misleading, crediting the plaintiffs’ scholarly and FDA-based support for treating citric acid as a preservative and finding they had sufficiently alleged how Aspergillus niger-derived citric acid differs chemically from the natural version.⁸

In Ward v. Pepperidge Farm, Inc. (S.D.N.Y. 2025), a court held that a consumer plausibly alleged the “No Artificial Flavors or Preservatives” claim on Goldfish crackers was misleading because of citric acid. The judge found that shoppers should not be expected to consult the ingredient list to correct claims “set forth in large bold type on the front of the box,” and rejected a federal preemption defense on the ground that the plaintiff was challenging the truthfulness of the label, not the sufficiency of federally required disclosures.⁹

Cases That Were Dismissed

In Vineyard v. La Terra Fina USA, LLC (S.D. Ill. 2025), a judge dismissed a class action over “no artificial preservatives” labeling on snack dips, faulting the plaintiff for “impermissible probability-based reasoning” — inferring that the defendant’s citric acid was artificial from the fact that 99% of the world’s citric acid is industrially produced, without tying that to the defendant’s actual sourcing.¹⁰

In Valencia v. Snapple Beverage Corp. (S.D.N.Y. 2024), a court dismissed “all natural” claims because the plaintiff never explained how Aspergillus niger-derived citric acid is chemically different from naturally occurring citric acid.⁸

What the Split Suggests for Palmer

Coca-Cola’s dismissal motion runs on two tracks: that Palmer has not plausibly alleged its citric acid is artificial, and that federal law preempts the California claims.⁵ The preemption theory has generally lost in this line of cases; the Ward court, among others, held that the federal Food, Drug, and Cosmetic Act does not stop states from policing truthfulness in labeling.⁹

The harder question is factual specificity. Palmer’s complaint leans on the FDA’s recognition of citric acid’s preservative functions and on the Aspergillus niger production process. Whether that clears the bar set in Vineyard and Valencia depends on how closely her allegations tie general industry practice to the citric acid actually used in Sprite and Fanta. Judges applying Delvalle, Hayes, and Ward would likely send the case into discovery; judges applying Vineyard and Valencia would likely not. The ruling in Palmer will fall on one side of that line.

1
ClassAction.org. Palmer v. The Coca-Cola Company, Class Action Complaint
2
PACER Monitor. Victoria Palmer v. The Coca-Cola Company
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Justia Dockets. Victoria Palmer v. The Coca-Cola Company
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Baker Donelson. How Food and Beverage Manufacturers Can Minimize Their Exposure to the Wave of Citric Acid-Based Lawsuits
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Law360. Victoria Palmer v. The Coca-Cola Company
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eCFR. 21 CFR 184.1033 – Citric Acid
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FDA. Food Substances – Citric Acid
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Inside Class Actions. Illinois Federal Court Permits Citric Acid Case to Proceed
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Justia. Ward v. Pepperidge Farm, Inc.
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Tabet DiVito & Rothstein. TDR Secures Dismissal of All Claims in Consumer Fraud Action