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- calendar_today October 7, 2026
Lawsuit Challenges Sugar-Free Claims on Starbucks Protein Beverages
Starbucks is facing a proposed class-action lawsuit in the United States, with consumers alleging that the coffee chain falsely advertised eight of its protein beverages as "sugar-free." The challenge hinges on the fact that these drinks, despite their label, contain lactose—a naturally occurring sugar found in milk.
Details of the Legal Complaint
The lawsuit was filed on Friday in a Seattle federal court and reviewed by CBC News. It accuses Starbucks of attempting to profit from the growing popularity of high-protein products and consumers’ nutritional preferences. Specifically, the complaint focuses on the chain’s use of “sugar-free” wording for beverages that, according to the lawsuit, contain between 13 and 21 grams of sugar per venti serving due to lactose content.
"By naming its beverages 'Sugar-Free,' Starbucks makes a specific, quantitative and verifiable claim about the nature of these beverages. Consumers rely upon such claims when deciding to purchase such products," the lawsuit states.
Which Drinks Are Involved?
The eight beverages named in the lawsuit are:
- Sugar-free vanilla protein latte
- Sugar-free caramel protein latte
- Sugar-free vanilla protein matcha
- Sugar-free caramel protein matcha
- Iced sugar-free vanilla protein latte
- Iced sugar-free caramel protein latte
- Iced sugar-free vanilla protein matcha
- Iced sugar-free caramel protein matcha
These drinks are promoted on both Starbucks’ U.S. and Canadian websites as featuring "no added sugar options," yet each carries "sugar-free" in the product title. Starbucks introduced these protein beverages in September 2025, stating they were "available unsweetened or sugar-free and are designed to support customers looking to add protein to their order."
Are the Protein Drinks Actually Sugar-Free?
According to nutritional information available on Starbucks’ website, each of the eight beverages in question contains between 13 and 21 grams of sugar per venti-sized serving. For example, a venti iced sugar-free vanilla protein latte has 13 grams of sugar, while a venti sugar-free caramel protein matcha has 21 grams. These amounts are comparable to the sugar content in popular chocolate bars, with 21 grams roughly equal to the sugar found in a Kit Kat bar.
The critical point raised in the lawsuit is that all of these drinks contain milk, and thus lactose, which is classified as a sugar both in Canada and the U.S. The suit argues that labeling the beverages as "sugar-free" is misleading given the presence of naturally occurring sugar.
Federal Laws on Sugar-Free Labeling
U.S. federal law forbids products from being labeled as "sugar-free" if they contain more than 0.5 grams of sugar per 12-ounce serving, even when the sugar is naturally occurring, such as lactose in milk. Similarly, under Canada’s Food and Drug Regulations, products must contain less than 0.5 grams of sugars per reference amount and serving size to qualify as sugar-free.
The distinction is important: labeling a drink as “sugar-free” is not the same as describing it as containing “no added sugars.” Starbucks does use sugar-free syrups in these beverages but includes sugars inherent in milk, which must be taken into account for nutritional claims.
Implications and Next Steps
The lawsuit seeks unspecified damages related to false advertising and violation of various state consumer protection laws. Filed by three consumers from California, New York, and Washington, the complaint also asks for class-action status and a trial by jury.
Steve Berman, co-founder and managing partner of the Seattle-based law firm representing the plaintiffs, stated, "Beverages with this much sugar are like drinking a candy bar." He emphasized that accurate labeling is important to consumers, especially those seeking to avoid sugar for health reasons, such as diabetes.
Starbucks has responded by asserting that the lawsuit is without merit and maintains it has "consistently and clearly provided information about its protein beverages, sugar-free options, customization choices and nutritional content." The company has committed to vigorously defending itself in court.
