Starbucks faces a federal lawsuit alleging the coffee giant deceived consumers by marketing protein drinks as sugar-free despite containing up to 21 grams of sugar per serving, potentially violating federal food labeling regulations that could expose the company to nationwide class action damages.

Federal Complaint Challenges Product Names

Three consumers filed suit Friday in U.S. District Court for the Western District of Washington targeting eight Starbucks protein beverages marketed with the term sugar-free in their names. The complaint alleges venti-sized Sugar-Free Caramel Protein Matcha contains 21 grams of sugar, while Sugar-Free Vanilla Protein Matcha contains 20 grams. Michael Walsh of California, Anne Legnini of New York, and Elna Potter of Washington seek to represent a nationwide class of customers who purchased the beverages since Starbucks launched its protein lineup in September 2025.

The plaintiffs acknowledge Starbucks provides nutritional information showing sugar content but argue the sugar-free product names violate Food and Drug Administration regulations. Federal rules permit a sugar-free claim only when products contain less than 0.5 grams of sugar per labeled serving. The lawsuit contends Starbucks fails to meet this threshold because the sugar comes from lactose naturally present in milk used to make the beverages.

New York Post

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Starbucks sued for allegedly mislabeling ‘sugar-free’ protein drinks trib.al/vnpoXTr

8:03 AM · Oct 7, 2026

Company Disputes Misleading Claims Allegations

Starbucks defended its labeling practices and vowed to fight the lawsuit vigorously. A company spokesperson stated Starbucks consistently provided clear information about its protein beverages across product announcements, menus, marketing materials, its website, and mobile app. The company distinguished between total sugar and added sugar in product descriptions, noting the beverages contain no added sugar while incorporating sugar-free into their names. Starbucks maintains its nutritional transparency eliminates any consumer confusion about the products’ contents.

The lawsuit also alleges Starbucks failed to provide calorie disclaimers required under FDA regulations when sugar-free claims appear on products not labeled low or reduced calorie. The eight beverages contain approximately 270 to 340 calories per venti serving, according to the complaint.

What This Means For Consumers

The case highlights growing scrutiny over food and beverage labeling as companies respond to consumer demand for healthier options. Plaintiffs are pursuing claims under consumer protection and false advertising laws in Washington, California, and New York, along with breach of implied warranty and unjust enrichment. They seek damages, restitution, and a court order barring Starbucks from marketing beverages as sugar-free unless they meet applicable federal requirements. The allegations remain unproven in court, and Starbucks denies any wrongdoing.