How Much Caffeine Is In A Tall Starbucks Decaf Coffee? - Tasting Table
Briefly

Starbucks decaf coffee is known for its rich flavor, yet it still contains about 20 milligrams of caffeine per tall brew, contrary to common belief that decaf is fully caffeine-free. The U.S. FDA recommends a maximum intake of 400 milligrams daily, making this amount relatively harmless. Starbucks's sizing terminology can be confusing for customers, as their 'tall' drink size closely resembles a standard medium at other coffee shops. Understanding these nuances helps customers better navigate their caffeine choices when opting for decaf.
When ordering decaf from Starbucks, it’s important to note that it still contains caffeine, with about 20 milligrams per tall brewed coffee.
Despite being lower in caffeine than regular coffee, Starbucks decaf has around 20 milligrams of caffeine, making it a small fraction of the daily limit advised by the FDA.
Starbucks uses unique sizing systems to categorize drinks, which often confuses customers, as its 'tall' size is comparable to what many call a medium.
The decaffeination process leaves residual caffeine in decaf coffee, which challenges the perception that decaf is completely caffeine-free.
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