Surprising Caffeine Content Variations
New Study Reveals Wide Disparities in Caffeine Content Across Major Coffee Chains
A study by consumer champion Which? found that caffeine content in high street coffee drinks varies wildly—sometimes by more than three times between chains. A medium cappuccino from Costa Coffee contains 325 milligrams of caffeine, compared to just 89 milligrams at Starbucks. That Costa drink packs as much caffeine as four cans of Red Bull, leaving coffee drinkers in the dark about what they're actually consuming.
Costa Delivers Triple the Caffeine of Starbucks
Which?'s analysis of five major chains—Caffe Nero, Costa Coffee, Greggs, Pret A Manger, and Starbucks—exposed stark differences in cappuccino strength. Costa's medium cappuccino led with 325mg of caffeine. Greggs and Caffe Nero followed in second and third place. Starbucks consistently served the least caffeine across its entire menu, with cappuccinos containing just 89mg per serving.
Starbucks Quietly Increased Caffeine Over Three Years
Although Starbucks remains the lowest-caffeine option, the chain has been gradually strengthening its drinks. Which?'s research tracked caffeine levels across three years and found increases in espressos, cappuccinos, and filter coffees. Consumers who switched to Starbucks thinking it was a lighter option may now be getting more of a caffeine kick than they bargained for.
Matcha Lattes Hide Significant Caffeine Content
The study also examined alternative drinks like matcha lattes, which many consumers assume are gentler than coffee. Costa's hot matcha latte topped the list with 99 milligrams of caffeine. Which? found that shoppers often underestimate how much caffeine they're consuming when choosing seemingly "healthier" beverage options.
Why Caffeine Labeling Matters for Your Health
The lack of clear caffeine labeling on high street menus creates a problem for health-conscious drinkers. People sensitive to caffeine, pregnant women, and those managing anxiety disorders need accurate information. Which?'s findings show that consumers cannot reliably guess caffeine content—the only solution is transparent labeling at the point of sale.
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