Consumers filed a class-action lawsuit against Starbucks in Seattle federal court on October 9, 2026, alleging false advertising. The complaint claims the coffee chain wrongly marketed eight protein beverages as "sugar-free," despite the drinks containing significant amounts of sugar from naturally occurring lactose.
The lawsuit asserts that "venti" servings contain 13 to 21 grams of sugar, exceeding federal limits for "sugar-free" labeling. Plaintiffs argue Starbucks misled customers seeking to reduce sugar intake. A company spokesperson stated the claims have no merit, adding that "we intend to vigorously defend ourselves." Starbucks launched the product line in September 2025 as part of an updated menu, and the lawsuit seeks unspecified damages for violations of consumer protection laws.